{"id":1653,"date":"2019-12-15T17:34:12","date_gmt":"2019-12-15T22:34:12","guid":{"rendered":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/?p=1653"},"modified":"2019-12-13T17:40:59","modified_gmt":"2019-12-13T22:40:59","slug":"math-9-lesson-14-fall-2019-12-15-2019","status":"publish","type":"post","link":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/2019\/12\/15\/math-9-lesson-14-fall-2019-12-15-2019\/","title":{"rendered":"Math 9, Lesson 14, Fall 2019, 12\/15\/2019"},"content":{"rendered":"\n<p>We review the properties of circles.<\/p>\n\n\n\n<p>In the symmetry properties category, we have the following:<\/p>\n\n\n\n<ul><li>Equal chords are &nbsp;equidistant from the center;<\/li><li>The perpendicular bisector of a chord passes through the center;<\/li><li>Tangents from an external point are equal in length;<\/li><li>The line joining an external point to the center bisects the angle between the tangents<\/li><\/ul>\n\n\n\n<p>In the category of angle properties, we have:<\/p>\n\n\n\n<ul><li>Angle in a semicircle is a right angle;<\/li><li>Angle between tangents and radius is a right angle;<\/li><li>Angle at the center is twice the angle at the circumference;<\/li><li>Angle in the same segment are equal;<\/li><li>Angle in opposite segments are supplementary.<\/li><\/ul>\n\n\n\n<p>Homework:<\/p>\n\n\n\n<p><a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2017\/02\/Math9HW20160131P0.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Page 0<\/a>,&nbsp;<a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2016\/01\/Math9HW20160131P1.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Page 1<\/a>,&nbsp;<a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2016\/01\/Math9HW20160131P2.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Page 2<\/a>,&nbsp;<a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2016\/01\/Math9HW20160131P3.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Page 3<\/a><\/p>\n\n\n\n<p>#2, #4, #6, #8, #10, #12, #14, #16, #18<\/p>\n\n\n\n<p>Answers to last week&#8217;s homework: <a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2016\/11\/AnswersRevisions6789.pdf\">answers<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>We review the properties of circles. In the symmetry properties category, we have the following: Equal chords are &nbsp;equidistant from the center; The perpendicular bisector of a chord passes through the center; Tangents from an external point are equal in length; The line joining an external point to the center bisects the angle between the [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[28,4,20,3],"tags":[],"_links":{"self":[{"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/posts\/1653"}],"collection":[{"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/comments?post=1653"}],"version-history":[{"count":2,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/posts\/1653\/revisions"}],"predecessor-version":[{"id":1655,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/posts\/1653\/revisions\/1655"}],"wp:attachment":[{"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/media?parent=1653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/categories?post=1653"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/tags?post=1653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}