{"id":7141,"date":"2021-12-29T11:12:57","date_gmt":"2021-12-29T11:12:57","guid":{"rendered":"https:\/\/stgwebsite.mindspark.in\/studymaterial\/?page_id=7141"},"modified":"2022-01-03T07:20:15","modified_gmt":"2022-01-03T07:20:15","slug":"reflex-angle-definition-examples","status":"publish","type":"page","link":"https:\/\/stgwebsite.mindspark.in\/studymaterial\/math-concepts\/reflex-angle-definition-examples\/","title":{"rendered":"Reflex angle \u2013 Definition \u2013 Examples"},"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>Reflex angle \u2013 Definition \u2013 Examples<\/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>Reflex angle<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Based on the measurements, angles are classified into 5 types<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Acute angle (0\u00b0 &lt; \u03b8 &lt; 90\u00b0)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Right angle (\u03b8 = 90\u00b0)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Obtuse angle (90\u00b0 &lt; \u03b8 &lt; 180\u00b0)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Straight angle (\u03b8 = 180\u00b0)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Reflex angle (180\u00b0 &lt; \u03b8 &lt; 360\u00b0)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Complete angle (\u03b8 = 360\u00b0)<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">If the measure of the angle is greater than that of a straight angle (180\u00b0) but smaller than that of a complete angle (360\u00b0), it is called a reflex angle.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">Since the reflex angle is always greater than 180\u00b0 but less than 360\u00b0, we can write it as the sum of straight angles and other angles which are less than a straight angle.<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Straight angle + Acute angle\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Straight angle + Right angle\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Straight angle + Obtuse angle<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">It can be also written in the following forms<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Complete angle <\/span><span style=\"font-weight: 400;\">&#8211;<\/span><span style=\"font-weight: 400;\"> acute angle\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Complete angle <\/span><span style=\"font-weight: 400;\">&#8211;<\/span><span style=\"font-weight: 400;\"> right angle\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Complete angle <\/span><span style=\"font-weight: 400;\">&#8211;<\/span><span style=\"font-weight: 400;\"> obtuse angle<\/span><span style=\"font-weight: 400;\"><\/span><\/li>\n<\/ol>\n<p style=\"text-align: center;\">\n<p style=\"text-align: center;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eistudymaterial.s3.amazonaws.com\/reflex-angle-01-300x140.png\" width=\"501\" height=\"234\" alt=\"\" class=\"wp-image-7143 alignnone size-medium\" srcset=\"https:\/\/eistudymaterial.s3.amazonaws.com\/reflex-angle-01-300x140.png 300w, https:\/\/eistudymaterial.s3.amazonaws.com\/reflex-angle-01-480x224.png 480w, https:\/\/eistudymaterial.s3.amazonaws.com\/reflex-angle-01.png 768w\" sizes=\"(max-width: 501px) 100vw, 501px\" \/><\/span><\/p>\n<h2><b><\/b><\/h2>\n<h2><b>Measurement using protractors<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">An angle less than 180\u00b0 can be easily measured through a protractor. For angles more than 180\u00b0, we can\u2019t measure it directly using protractors. Here we have to measure the smaller angle using the protractor and then subtract it from 360\u00b0.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here is an example showing the procedure.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<h3><b>Example<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Find the measure of the reflex angle <\/span><span style=\"font-weight: 400;\">\u2220AOB<\/span><\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eistudymaterial.s3.amazonaws.com\/Screenshot-2021-12-29-170243-300x192.png\" width=\"377\" height=\"241\" alt=\"\" class=\"wp-image-7150 alignnone size-medium\" srcset=\"https:\/\/eistudymaterial.s3.amazonaws.com\/Screenshot-2021-12-29-170243-300x192.png 300w, https:\/\/eistudymaterial.s3.amazonaws.com\/Screenshot-2021-12-29-170243.png 341w\" sizes=\"(max-width: 377px) 100vw, 377px\" \/><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">We have to find the measure larger angle <\/span><span style=\"font-weight: 400;\">\u2220<\/span><span style=\"font-weight: 400;\">b and it is greater than 180\u00b0. It is not possible to measure it using a protractor because a protractor can only measure up to 180\u00b0.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">But angle <\/span><span style=\"font-weight: 400;\">\u2220<\/span><span style=\"font-weight: 400;\">a is less than 180\u00b0 and we can measure that. The measure of <\/span><span style=\"font-weight: 400;\">\u2220a = <\/span><span style=\"font-weight: 400;\">140\u00b0 is shown in the figure and it is an obtuse angle.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">We already know that\u00a0<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">Reflex angle = Complete angle <\/span><span style=\"font-weight: 400;\">&#8211;<\/span><span style=\"font-weight: 400;\"> obtuse angle<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= 360\u00b0 &#8211; 140\u00b0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0= 220\u00b0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">4. Hence the measure of <\/span><span style=\"font-weight: 400;\">\u2220AOB = \u2220b is <\/span><span style=\"font-weight: 400;\">220\u00b0.<\/span><span style=\"font-weight: 400;\"><\/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; _builder_version=&#8221;4.10.4&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#fdefe0&#8243; custom_padding=&#8221;25px|25px|25px|25px|true|true&#8221; sticky_position=&#8221;top&#8221; sticky_offset_top=&#8221;-280px&#8221; sticky_limit_top=&#8221;row&#8221; sticky_limit_bottom=&#8221;row&#8221; sticky_position_tablet=&#8221;none&#8221; sticky_position_phone=&#8221;none&#8221; sticky_position_last_edited=&#8221;on|desktop&#8221; sticky_limit_bottom_tablet=&#8221;&#8221; sticky_limit_bottom_phone=&#8221;&#8221; sticky_limit_bottom_last_edited=&#8221;on|phone&#8221; border_radii=&#8221;on|15px|15px|15px|15px&#8221; box_shadow_style=&#8221;preset3&#8243; 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_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\/corresponding-angles-definition-theorems-examples-faq\/\" class=\"otherc\">Corresponding Angles<\/a><\/div>\n<div class=\"trr\"><a href=\"https:\/\/mindspark.in\/studymaterial\/math-concepts\/adjacent-angles-with-examples-and-faqs\/\" class=\"otherc\">Adjacent Angles<\/a><\/div>\n<div class=\"trr\"><a href=\"https:\/\/mindspark.in\/studymaterial\/math-concepts\/vertically-opposite-angles\/\" class=\"otherc\">Vertically Opposite Angles<\/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; 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 a reflex angle?<br \/><\/strong><\/h3>\n<p><span style=\"font-weight: 400;\"><strong>Ans: <\/strong>Any angle in between a straight angle and a complete angle is termed a reflex angle.<strong><\/strong><\/span><span style=\"font-weight: 400;\"><\/span><span style=\"font-weight: 400;\"><\/span><\/p>\n<h3><strong>Q2. What do you mean by a complete angle?<br \/><\/strong><\/h3>\n<p><strong>Ans: <\/strong>The angle with a measure of 360 degrees is termed a complete angle.<strong><\/strong><strong><\/strong><\/p>\n<h3><strong>Q3. What do you mean by reflex of an angle?<br \/><\/strong><\/h3>\n<p><strong>Ans: <\/strong><span style=\"font-weight: 400;\">Reflex of an angle = 360\u00b0 &#8211; angle<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ex- Reflex of 45\u00b0 = 360\u00b0 &#8211; 45\u00b0 = 315\u00b0<\/span><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>Reflex angle \u2013 Definition \u2013 Examples - 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