{"id":4754,"date":"2021-11-28T16:14:50","date_gmt":"2021-11-28T16:14:50","guid":{"rendered":"https:\/\/stgwebsite.mindspark.in\/studymaterial\/?page_id=4754"},"modified":"2022-01-03T07:58:36","modified_gmt":"2022-01-03T07:58:36","slug":"perimeter-of-a-semicircle-mindspark","status":"publish","type":"page","link":"https:\/\/stgwebsite.mindspark.in\/studymaterial\/math-concepts\/perimeter-of-a-semicircle-mindspark\/","title":{"rendered":"PERIMETER OF A SEMICIRCLE &#8211; MINDSPARK"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;Section&#8221; module_class=&#8221;mainsec&#8221; _builder_version=&#8221;4.10.4&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#e0f2fd&#8221; z_index=&#8221;1&#8243; custom_padding=&#8221;5px||5px||true|false&#8221; locked=&#8221;off&#8221; collapsed=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;3_5,2_5&#8243; custom_padding_last_edited=&#8221;on|phone&#8221; _builder_version=&#8221;4.10.8&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#FFFFFF&#8221; width=&#8221;100%&#8221; max_width=&#8221;1310px&#8221; custom_padding=&#8221;|51px|40px|51px|false|true&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;|40px|30px|40px|false|true&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;3_5&#8243; admin_label=&#8221;Column L&#8221; _builder_version=&#8221;4.9.10&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;Acute Angles<br \/>\n&#8221; _builder_version=&#8221;4.11.3&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|700|||||||&#8221; header_text_align=&#8221;left&#8221; header_font_size=&#8221;50px&#8221; header_line_height=&#8221;1.18em&#8221; custom_padding=&#8221;|0px||4px|false|false&#8221; header_font_size_tablet=&#8221;&#8221; header_font_size_phone=&#8221;35px&#8221; header_font_size_last_edited=&#8221;on|phone&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>PERIMETER OF A SEMICIRCLE &#8211; MINDSPARK<\/h1>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.13.1&#8243; _module_preset=&#8221;default&#8221; text_font_size=&#8221;16px&#8221; header_2_font=&#8221;|600|||||||&#8221; header_2_text_color=&#8221;#a01414&#8243; header_3_font=&#8221;|600|||||||&#8221; custom_padding=&#8221;15px|15px|54px|4px|false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2><b>PERIMETER OF A SEMI-CIRCLE<\/b><b><\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Perimeter is nothing but the length of the boundary. A semicircle is the half of a circle so the perimeter of a semicircle is the length of the boundary as shown in the figure below:<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eistudymaterial.s3.amazonaws.com\/iamge-image-165x300.png\" width=\"251\" height=\"456\" alt=\"\" class=\"wp-image-4756 alignnone size-medium\" style=\"display: block; margin-left: auto; margin-right: auto;\" srcset=\"https:\/\/eistudymaterial.s3.amazonaws.com\/iamge-image-165x300.png 165w, https:\/\/eistudymaterial.s3.amazonaws.com\/iamge-image.png 259w\" sizes=\"(max-width: 251px) 100vw, 251px\" \/><\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">The black border is the boundary or the perimeter of the semicircle. O is the centre and the length from A to B through the centre is the diameter. The length from O to A is equal to the length from O to B and is the radius of the semicircle. Radius is equal to half the length of the diameter of the semicircle. <\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>HOW TO FIND THE PERIMETER OF THE SEMICIRCLE?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">It is easy to find the perimeter of the semicircle. We need to know the formula for the perimeter of a circle.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Perimeter of the circle = <\/span><span style=\"font-weight: 400;\">2\u03c0r<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We will divide the perimeter by 2 to find the curved part of the semicircle which will give us<\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"font-weight: 400;\"><span class=\"katex-eq\" data-katex-display=\"false\">\\frac{2 \\pi r}{2}=\\pi r<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\">When we find the perimeter of the semicircle, the boundary does not include the line AB which is the diameter. Here, in the case of the semicircle, we will need to include the diameter (denoted as d) as well since it counts as the boundary or the perimeter of the semicircle<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Perimeter of the semi-circle =\u00a0 <\/span><span style=\"font-weight: 400;\">(<\/span><span style=\"font-weight: 400;\">\u03c0r + d)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Now, we know that d = 2r or diameter is twice the radius. Replacing the value of <strong>d<\/strong> we get,<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Perimeter of the semi-circle =\u00a0 <\/span><span style=\"font-weight: 400;\">(<\/span><span style=\"font-weight: 400;\">\u03c0r + 2r)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Perimeter of the semi-circle =\u00a0 <\/span><span style=\"font-weight: 400;\">r(\u03c0 <\/span><span style=\"font-weight: 400;\">+ 2)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Where the value of \u03c0 is<\/span><span style=\"font-weight: 400;\"> <span class=\"katex-eq\" data-katex-display=\"false\">\\frac{22}{7} \\text { or } 3.14<\/span>\u00a0<\/span><span style=\"font-weight: 400;\">which is a constant.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<h2><b>EXAMPLES:<\/b><\/h2>\n<p><b>1. What will be the perimeter of a semicircle which has a radius of 7 cm?<\/b><\/p>\n<p><b><span style=\"font-weight: 400;\"><strong>Ans:<\/strong> <\/span><\/b><\/p>\n<p><b><span style=\"font-weight: 400;\">Perimeter of the semi-circle <\/span><\/b><\/p>\n<p><b><span style=\"font-weight: 400;\"><span class=\"katex-eq\" data-katex-display=\"false\">=7\\left[\\frac{22}{7}+2\\right]<\/span><\/span><\/b><\/p>\n<p><b><span style=\"font-weight: 400;\"><span class=\"katex-eq\" data-katex-display=\"false\">=7\\left[\\frac{22+14}{7}\\right]<\/span><\/span><\/b><\/p>\n<p><span style=\"font-weight: 400;\">= 36 cm<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Therefore, the perimeter is 36 cm.<\/span><\/p>\n<p><strong>2. Find the radius of the semicircle whose perimeter is 72 cm.<\/strong><\/p>\n<p><span style=\"font-weight: 400;\"><strong>Ans:<\/strong> <span class=\"katex-eq\" data-katex-display=\"false\">72=r\\left[\\frac{22}{7}+2\\right]<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\"><span class=\"katex-eq\" data-katex-display=\"false\">\\Rightarrow 72=r\\left[\\frac{22+14}{7}\\right]<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\"><span class=\"katex-eq\" data-katex-display=\"false\">\\Rightarrow 72=r\\left[\\frac{36}{7}\\right]<\/span><\/span><\/p>\n<p><b><span style=\"font-weight: 400;\"><span class=\"katex-eq\" data-katex-display=\"false\">\\Rightarrow\\frac{(72)(7)}{36}=r<\/span><\/span><\/b><\/p>\n<p><span style=\"font-weight: 400;\">\u2234 r = 14<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Therefore, the radius is 14 cm.<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;2_5&#8243; module_id=&#8221;stickysideR&#8221; admin_label=&#8221;Column R&#8221; 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_builder_version=&#8221;4.11.1&#8243; _module_preset=&#8221;default&#8221; custom_padding=&#8221;||||false|false&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; global_colors_info=&#8221;{}&#8221; transform_styles__hover_enabled=&#8221;on|hover&#8221; transform_scale__hover_enabled=&#8221;on|hover&#8221; transform_translate__hover_enabled=&#8221;on|desktop&#8221; transform_rotate__hover_enabled=&#8221;on|desktop&#8221; transform_skew__hover_enabled=&#8221;on|desktop&#8221; transform_origin__hover_enabled=&#8221;on|desktop&#8221; transform_scale__hover=&#8221;102%|102%&#8221;][\/et_pb_image][et_pb_text admin_label=&#8221;Explore Other Topics<br \/>\n&#8221; _builder_version=&#8221;4.9.11&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|700|||||||&#8221; header_font_size=&#8221;25px&#8221; text_orientation=&#8221;center&#8221; custom_margin=&#8221;0px||0px||true|false&#8221; custom_padding=&#8221;8px|15px|0px|15px|false|true&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>Explore Other Topics<\/h1>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.10.7&#8243; _module_preset=&#8221;default&#8221; text_line_height=&#8221;2.2em&#8221; link_font_size=&#8221;16px&#8221; custom_margin=&#8221;||0px||false|false&#8221; custom_padding=&#8221;10px|15px|10px|28px|true|false&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div>\n<div class=\"trr\"><a href=\"https:\/\/stgwebsite.mindspark.in\/wordpress\/math-concepts\/#geometry\" class=\"otherc\">Geometry<\/a><\/div>\n<div class=\"trr\"><a href=\"https:\/\/stgwebsite.mindspark.in\/wordpress\/math-concepts\/#trigonometry\" class=\"otherc\">Trigonometry<\/a><\/div>\n<div class=\"trr\"><a href=\"https:\/\/stgwebsite.mindspark.in\/wordpress\/math-concepts\/#operations\" class=\"otherc\">Operations<\/a><\/div>\n<div class=\"trr\"><a href=\"https:\/\/stgwebsite.mindspark.in\/wordpress\/math-concepts\/#numbers\" class=\"otherc\">Numbers<\/a><\/div>\n<\/div>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;Related Concepts<br \/>\n&#8221; _builder_version=&#8221;4.9.11&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|700|||||||&#8221; header_font_size=&#8221;25px&#8221; text_orientation=&#8221;center&#8221; custom_margin=&#8221;0px||0px||true|false&#8221; custom_padding=&#8221;8px|15px|0px|15px|false|true&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>Related Concepts<\/h1>\n<p>[\/et_pb_text][et_pb_text _builder_version=&#8221;4.13.1&#8243; _module_preset=&#8221;default&#8221; text_line_height=&#8221;2.2em&#8221; link_font_size=&#8221;16px&#8221; custom_margin=&#8221;||0px||false|false&#8221; custom_padding=&#8221;10px|15px|10px|28px|true|false&#8221; locked=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div>\n<div class=\"trr\"><a href=\"https:\/\/mindspark.in\/studymaterial\/math-concepts\/area-of-a-semicircle-mindspark\/\" class=\"otherc\">Area of Semicircle<\/a><\/div>\n<div class=\"trr\"><a href=\"https:\/\/mindspark.in\/studymaterial\/math-concepts\/mensuration-formula-2d-and-3d-shapes\/\" class=\"otherc\">Mensuration Formula<\/a><\/div>\n<div class=\"trr\"><a href=\"https:\/\/mindspark.in\/studymaterial\/math-concepts\/area-and-perimeter-of-a-circle-with-examples-and-faqs\/\" class=\"otherc\">Area and Perimeter of Circle<\/a><a href=\"#\" class=\"otherc\"><\/a><\/div>\n<\/div>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=&#8221;Row for space&#8221; 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_module_preset=&#8221;default&#8221; background_color=&#8221;#fff7d6&#8243; width=&#8221;100%&#8221; max_width=&#8221;1310px&#8221; height=&#8221;134px&#8221; custom_margin=&#8221;||50px||false|false&#8221; custom_padding=&#8221;12px||12px||true|false&#8221; border_radii=&#8221;on|11px|11px|11px|11px&#8221; locked=&#8221;off&#8221; collapsed=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.9.10&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_image src=&#8221;https:\/\/stgwebsite.mindspark.in\/wordpress\/wp-content\/uploads\/2021\/08\/calloutImage.png&#8221; title_text=&#8221;calloutImage&#8221; show_bottom_space=&#8221;off&#8221; admin_label=&#8221;Image&#8221; module_class=&#8221;img1&#8243; _builder_version=&#8221;4.10.8&#8243; _module_preset=&#8221;default&#8221; width=&#8221;25px&#8221; height=&#8221;60px&#8221; custom_padding=&#8221;2px||2px||true|false&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][et_pb_text module_class=&#8221;ftstyle&#8221; _builder_version=&#8221;4.9.10&#8243; _module_preset=&#8221;default&#8221; text_orientation=&#8221;center&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<div class=\"ffmanage\">\n<div class=\"textmanagestyle\">\n<div class=\"fone\">\n<p>Ready to get started ?<\/p>\n<\/div>\n<div class=\"sone\">\n<p class=\"ffbtn\"><a href=\"https:\/\/mindspark.in\/free-trial\">Start Free Trial<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p>[\/et_pb_text][et_pb_image src=&#8221;https:\/\/stgwebsite.mindspark.in\/wordpress\/wp-content\/uploads\/2021\/08\/down-circle.png&#8221; title_text=&#8221;down-circle&#8221; show_bottom_space=&#8221;off&#8221; align=&#8221;right&#8221; module_class=&#8221;img2&#8243; _builder_version=&#8221;4.9.10&#8243; _module_preset=&#8221;default&#8221; width=&#8221;44px&#8221; height=&#8221;18px&#8221; custom_padding=&#8221;2px||2px||true|false&#8221; global_colors_info=&#8221;{}&#8221;][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row admin_label=&#8221;FAQ Row&#8221; _builder_version=&#8221;4.9.11&#8243; _module_preset=&#8221;default&#8221; width=&#8221;100%&#8221; max_width=&#8221;1310px&#8221; custom_padding=&#8221;|40px||40px|false|true&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;4_4&#8243; _builder_version=&#8221;4.9.11&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;FAQ&#8221; module_class=&#8221;faqstyl&#8221; _builder_version=&#8221;4.13.1&#8243; _module_preset=&#8221;default&#8221; text_font_size=&#8221;16px&#8221; header_font=&#8221;|700|||||||&#8221; header_text_align=&#8221;center&#8221; header_line_height=&#8221;2.5em&#8221; background_color=&#8221;#dbedc6&#8243; max_width=&#8221;80%&#8221; module_alignment=&#8221;center&#8221; custom_margin=&#8221;||||false|false&#8221; custom_padding=&#8221;30px|25px|30px|25px|true|true&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>Frequently Asked Questions<span style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">\u00a0<\/span><\/span><\/h1>\n<ol><\/ol>\n<h3><strong>Q1: What is the circumference of a semicircle?<br \/><\/strong><\/h3>\n<p><span style=\"font-weight: 400;\"><strong>Ans: <\/strong>Circumference or the perimeter of the semicircle is the length of its boundary.<br \/>Perimeter of the semi-circle = r(\u03c0 + 2).<\/span><\/p>\n<h3><strong>Q2. What is the formula for the circumference of a circle?<\/strong><\/h3>\n<p><strong>Ans: <\/strong>The formula for the perimeter or circumference of the circle is 2\u03c0r.<\/p>\n<h3><strong>Q3. How to find the perimeter of the semicircle if the diameter is given?<\/strong><\/h3>\n<p><strong>Ans: <\/strong><span style=\"font-weight: 400;\">Diameter is simply twice the radius. If we know the diameter, we can simply divide it by 2 <\/span><span style=\"font-weight: 400;\">to find the radius and then put that in the formula of the perimeter of the semicircle.<\/span><\/p>\n<p><strong><\/strong><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Meta Description: We can calculate the sum of the terms in a geometric progression using the formula  S = a(1-r^n)\/(1-r) when r < 1 and  S = a(r^n-1)\/(r-1)when r>1<\/p>\n","protected":false},"author":10,"featured_media":0,"parent":714,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PERIMETER OF A SEMICIRCLE - MINDSPARK - mydomain<\/title>\n<meta name=\"description\" content=\"Meta Description: We can calculate the sum of the terms in a geometric progression using the formula S = a(1-r^n)\/(1-r) when r &lt; 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