{"id":1111,"date":"2017-01-29T16:50:21","date_gmt":"2017-01-29T21:50:21","guid":{"rendered":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/?p=1111"},"modified":"2017-02-04T16:53:18","modified_gmt":"2017-02-04T21:53:18","slug":"math-9-lesson-1-spring-2017-1292017","status":"publish","type":"post","link":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/2017\/01\/29\/math-9-lesson-1-spring-2017-1292017\/","title":{"rendered":"Math 9, Lesson 1, Spring 2017, 1\/29\/2017"},"content":{"rendered":"<p>Students will bring home their final exam papers. I have uploaded answers for the exam <a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2016\/01\/Math9Fall2015FinalExamAnswers.pdf\" target=\"_blank\">here<\/a>.<\/p>\n<p>Apart from going over some exam questions, we review the properties of circles.<\/p>\n<p>In the symmetry properties category, we have the following:<\/p>\n<ul>\n<li>Equal chords are \u00a0equidistant from the center;<\/li>\n<li>The perpendicular bisector of a chord passes through the center;<\/li>\n<li>Tangents from an external point are equal in length;<\/li>\n<li>The line joining an external point to the center bisects the angle between the tangents<\/li>\n<\/ul>\n<p>In the category of angle properties, we have:<\/p>\n<ul>\n<li>Angle in a semicircle is a right angle;<\/li>\n<li>Angle between tangents and radius is a right angle;<\/li>\n<li>Angle at the center is twice the angle at the circumference;<\/li>\n<li>Angle in the same segment are equal;<\/li>\n<li>Angle in opposite segments are supplementary.<\/li>\n<\/ul>\n<p>Homework:<\/p>\n<p><a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2017\/02\/Math9HW20160131P0.pdf\" target=\"_blank\">Page 0<\/a>,\u00a0<a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2016\/01\/Math9HW20160131P1.pdf\" target=\"_blank\">Page 1<\/a>, <a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2016\/01\/Math9HW20160131P2.pdf\" target=\"_blank\">Page 2<\/a>, <a href=\"http:\/\/blog.newtonchineseschool.org\/wangweidong\/files\/2016\/01\/Math9HW20160131P3.pdf\" target=\"_blank\">Page 3<\/a><\/p>\n<p>#2, #4, #6, #8, #10, #12, #14, #16, #18<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Students will bring home their final exam papers. I have uploaded answers for the exam here. Apart from going over some exam questions, we review the properties of circles. In the symmetry properties category, we have the following: Equal chords are \u00a0equidistant from the center; The perpendicular bisector of a chord passes through the center; [&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":[4,19,3],"tags":[],"_links":{"self":[{"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/posts\/1111"}],"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=1111"}],"version-history":[{"count":2,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/posts\/1111\/revisions"}],"predecessor-version":[{"id":1118,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/posts\/1111\/revisions\/1118"}],"wp:attachment":[{"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/media?parent=1111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/categories?post=1111"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.newtonchineseschool.org\/wangweidong\/wp-json\/wp\/v2\/tags?post=1111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}