{"id":650,"date":"2023-09-26T15:38:59","date_gmt":"2023-09-26T15:38:59","guid":{"rendered":"http:\/\/localhost\/ecole9ja\/?p=650"},"modified":"2023-09-26T15:42:12","modified_gmt":"2023-09-26T15:42:12","slug":"week-5-and-6-jss-1-third-term-mathematics-lesson-notes","status":"publish","type":"post","link":"https:\/\/ecolebooks.com\/nigeria\/posts\/week-5-and-6-jss-1-third-term-mathematics-lesson-notes\/","title":{"rendered":"Week 5 and 6 – Jss 1 Third Term Mathematics Lesson Notes"},"content":{"rendered":"

WEEK 5 AND 6\u00a0\u00a0\u00a0\u00a0
\n<\/strong>TOPIC: IDENTIFICATION AND PROPERTIES OF ANGLES
\n<\/strong><\/p>\n

TYPES AND PROPERTIES OF ANGLES
\n<\/h3>\n

Straight Angles
\n\tAngles which measure exactly 180\u00b0 (degrees) are straight angles. Therefore, straight angles are straight lines. Angles are represented by the sign \u03f4, called theta. That is, for straight angles, \u03f4= 180\u00b0.
\n\"\"
\n\tRight Angles
\n\tAngles which measure exactly 90\u00b0 are right angles, that is, \u03f4 = 90\u00b0.
\n\"\"
\n\tObtuse Angles
\n\tObtuse angles are those which are greater than 90\u00b0 but less than 180\u00b0, that is, 90\u00b0 <\u03f4< 180\u00b0.
\n\"\"<\/p>\n

\u00a0
\n\u00a0Acute Angles
\n\tAcute angles are angles which are greater than 0\u00b0 but less than 90\u00b0, that is, 0\u00b0 <\u03f4< 90\u00b0.
\n\"\"
\n\tReflex Angles
\n\tReflex angles are angles which are greater than 180\u00b0 but less than 360\u00b0, that is, 180\u00b0 <\u03f4< 360\u00b0.
\n\"\"
\n\tAdjacent Angles
\n\tTwo angles which share the same vertex (centre, usually represented by 0) and have a common side (line) are called adjacent angles.
\n\"\"<\/p>\n

\u00a0
\n\u00a0Complementary Angles
\n\tComplementary angles are two angles which when summed equals 90\u00b0.
\n\"\"
\n\tNote: <A and <B, are ‘angle A’ and ‘angle B’ respectively.
\nSupplementary Angles
\n\tSupplementary angles are two angles which when summed equals 180\u00b0.
\n\"\"
\n\tVertically Opposite Angles
\n\tVertically opposite angles are the angles opposite to each other when two straight lines intersect. Their defining property is that, vertically opposite angles are equal in magnitude.
\n\"\"
\n\tCorresponding Angles
\n\tWhen two parallel lines are crossed by a line called the transversal, the angles formed which are in corresponding positions, are called corresponding angles. Corresponding angles are equal in magnitude.
\n\"\"<\/p>\n

\u00a0Obtuse-Angled Triangles
\n\tObtuse-angled triangles are triangles with one of their angles greater than 90\u00b0 but less than 180\u00b0 (i.e. an obtuse angle).
\n\"\"
\n\tAcute-Angled Triangles
\n\tAcute-angled triangles are triangles in which all the angles are acute. That is, all angles are greater than 0\u00b0 but less than 90\u00b0.
\n\"\"
\n\tDo these
\n<\/strong>Exercise 21.2 pg 240 No ( 1-10)
\nAssignment: <\/strong> Exercise 21.3 pg 243 No (1 , 2, 5, 6, 10 & 12)<\/p>\n","protected":false},"excerpt":{"rendered":"

WEEK 5 AND 6\u00a0\u00a0\u00a0\u00a0 TOPIC: IDENTIFICATION AND PROPERTIES OF ANGLES TYPES AND PROPERTIES OF ANGLES…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,74],"tags":[],"class_list":["post-650","post","type-post","status-publish","format-standard","hentry","category-posts","category-third-term-jss1-mathematics"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/650","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/comments?post=650"}],"version-history":[{"count":1,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/650\/revisions"}],"predecessor-version":[{"id":651,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/650\/revisions\/651"}],"wp:attachment":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/media?parent=650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/categories?post=650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/tags?post=650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}