{"id":1125,"date":"2023-09-27T12:18:30","date_gmt":"2023-09-27T12:18:30","guid":{"rendered":"http:\/\/localhost\/ecole9ja\/?p=1125"},"modified":"2023-09-27T12:19:15","modified_gmt":"2023-09-27T12:19:15","slug":"week-7-and-8-jss-2-second-term-mathematics-lesson-notes","status":"publish","type":"post","link":"https:\/\/ecolebooks.com\/nigeria\/posts\/week-7-and-8-jss-2-second-term-mathematics-lesson-notes\/","title":{"rendered":"Week 7 and 8 – Jss 2 Second Term Mathematics Lesson Notes"},"content":{"rendered":"

WEEK 7 MID TERM REVIEW HALF LESSON
\n<\/strong>WEEK 8\u00a0\u00a0\u00a0\u00a0SCALE DRAWING
\n<\/strong>
\n\u00a0Since it is not always possible to draw on paper the actual size of real-life objects such as the real size of a car, an airplane, we need scale drawings to represent the size like the one you see below of a van.<\/p>\n\n\n\n
\u00a0<\/td>\n\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"\"\/In real-life, the length of this van may measure 240 inches. However, the length of a copy or print paper that you could use to draw this van is a little bit less than 12 inchesSince 240\/12 = 20, you will need about 20 sheets of copy paper to draw the length of the actual size of the vanIn order to use just one sheet, you could then use 1 inch on your drawing to represent 20 inches on the real-life objectYou can write this situation as 1:20 or 1\/20 or 1 to 20Notice that the first number always refers to the length of the drawing on paper and the second number refers to the length of real-life objectExample #1:<\/strong>Suppose a problem tells you that the length of a vehicle is drawn to scale. The scale of the drawing is 1:20If the length of the drawing of the vehicle on paper is 12 inches, how long is the vehicle in real life?Set up a proportion that will look like this:<\/p>\n\n\n\n
\"\"\/<\/td>\n\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Do a cross product by multiplying the numerator of one fraction by the denominator of the other fractionWe get : Length of drawing \u00d7 20 = Real length \u00d7 1Since length of drawing = 12, we get:12 \u00d7 20 = Real length \u00d7 1240 inches = Real lengthExample #2:<\/strong>The scale drawing of this tree is 1:500If the height of the tree on paper is 20 inches, what is the height of the tree in real life?<\/p>\n\n\n\n
\"\"\/<\/td>\n\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Set up a proportion like this:<\/p>\n\n\n\n
\"\"\/<\/td>\n\u00a0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Do a cross product by multiplying the numerator of one fraction by the denominator of the other fractionWe get : Height of drawing \u00d7 500 = Real height \u00d7 1Since height of drawing = 20, we get:20 \u00d7 500 = Real length \u00d7 110000 inches = Real height<\/p>\n","protected":false},"excerpt":{"rendered":"

WEEK 7 MID TERM REVIEW HALF LESSON WEEK 8\u00a0\u00a0\u00a0\u00a0SCALE DRAWING \u00a0Since it is not always…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,111],"tags":[],"class_list":["post-1125","post","type-post","status-publish","format-standard","hentry","category-posts","category-second-term-jss-2-mathematics"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1125","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=1125"}],"version-history":[{"count":1,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1125\/revisions"}],"predecessor-version":[{"id":1126,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/1125\/revisions\/1126"}],"wp:attachment":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/media?parent=1125"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/categories?post=1125"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/tags?post=1125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}