{"id":646,"date":"2023-09-26T15:37:23","date_gmt":"2023-09-26T15:37:23","guid":{"rendered":"http:\/\/localhost\/ecole9ja\/?p=646"},"modified":"2023-09-26T15:42:12","modified_gmt":"2023-09-26T15:42:12","slug":"week-3-jss-1-third-term-mathematics-lesson-notes","status":"publish","type":"post","link":"https:\/\/ecolebooks.com\/nigeria\/posts\/week-3-jss-1-third-term-mathematics-lesson-notes\/","title":{"rendered":"Week 3 – Jss 1 Third Term Mathematics Lesson Notes"},"content":{"rendered":"

WEEK 3.
\n<\/strong>TOPIC: AREA AND PERIMETER OF PLANE SHAPES
\n<\/strong>PERIMETER: <\/strong>The perimeter of a plane shape is the length of its outside boundary. This means the distance round its edges.
\nExamples
\n<\/strong>1. The length of a rectangular room is 5m and the width is 4m. find the perimeter of the room
\nSolution
\nThe length of the room = 5m
\nThe width of the room = 4m
\nPerimeter = 2(l+w)
\nPerimeter = 2(5+4)
\nPerimeter = 2(9)= 2×9= 18m
\n<\/strong><\/p>\n

    \n
  1. The perimeter of a square is 2580cm. find the length of the square in meter.\n<\/li>\n<\/ol>\n

    Solution:
    \nP= 2580cm = 25.8m
    \nP= 4 x length = 4l
    \nL = 25.8\/4
    \nL = 6.45m
    \nTherefore, the length of the square = 6.45m<\/p>\n

      \n
    1. Calculate the perimeter of a triangle with dimensions 4.2m, 3.6m and 5.7m.\n<\/li>\n<\/ol>\n

      Solution:
      \nPerimeter = (4.2 + 3.6 + 5.7) meters
      \nPerimeter = 13.5m<\/strong><\/p>\n

        \n
      1. A parallelogram has sides measuring 200mm by 150mm. what would be the length of the side of a square having the same perimeter?\n<\/li>\n<\/ol>\n

        Solution
        \nLength of parallelogram = 200mm
        \nThe width of the parallelogram = 150mm
        \nPerimeter = 2( L + w)
        \nPerimeter = 2(200 + 150) mm
        \nPerimeter = 2 x 350 = 700mm
        \nBut
        \nPerimeter of the square = 4 x length = 4L
        \n4L = 700mm
        \nDivide both sides by the coefficient of l
        \nL = 700\/4 = 175
        \nTherefore length of the square = 175mm
        \n<\/strong><\/p>\n

          \n
        1. Calculate the perimeter of a circle of diameter 14cm.\n<\/li>\n<\/ol>\n

          NOTE: The perimeter of a circle is called circumference and the diameter (D) is twice the radius (r). thus D = 2r
          \nSolution:
          \nMethod 1: circumference = \u03c0d<\/p>\n

          \t\tC = 22\/7 x 14
          \nC = 44cm
          \n<\/strong>Method 2:
          \nR = D\/2 = 14\/2 = 7cm
          \nC = 2 x 22\/7 x 7
          \nC= 44cm<\/p>\n

          \u00a0AREA:<\/strong> Area of shapes is the measure of amount of surface it covers or occupies.
          \nExamples :<\/p>\n

            \n
          1. Calculate the area of rectangular room with dimension 250cm by 200cm.\n<\/li>\n<\/ol>\n

            Solution:
            \n A = (250 x 200) square cm
            \n A =50 000 cm square.<\/p>\n

            \u00a0<\/p>\n

              \n
            1. Find the area of a square of sides 14cm.\n<\/li>\n<\/ol>\n

              Solution:
              \n A = 14 x 14
              \n A = 196 cm square<\/p>\n

              \u00a0<\/p>\n

                \n
              1. Evaluate the area of a parallelogram with base 8cm and height 9cm.\n<\/li>\n<\/ol>\n

                Solution:<\/p>\n

                \t\tA = 8 X 9
                \nA = 72 cm square<\/p>\n

                \u00a0<\/p>\n

                  \n
                1. Calculate the area of a trapezium with parallel sides 10cm and 18cm and height 12cm.\n<\/li>\n<\/ol>\n

                  Solution:
                  \n Area =
                  \nArea = \u00bd (10 + 18) x 12
                  \nArea = \u00bd (28) x 12
                  \nArea = 14 x 12
                  \nArea = 168 cm square.<\/p>\n

                  \u00a0Do these
                  \n<\/strong>Exercise 18.2 pg 198 No (2, 3,4 & 5)
                  \nExercise 18.3 pg 200 No (2, 3, 4 & 5)<\/p>\n

                  \u00a0 Assignment
                  \n<\/strong>Exercise 18.6 pg 209 No (2, 4, 5,9 & 10)<\/p>\n","protected":false},"excerpt":{"rendered":"

                  WEEK 3. TOPIC: AREA AND PERIMETER OF PLANE SHAPES PERIMETER: The perimeter of a plane…<\/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-646","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\/646","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=646"}],"version-history":[{"count":1,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/646\/revisions"}],"predecessor-version":[{"id":647,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/646\/revisions\/647"}],"wp:attachment":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/media?parent=646"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/categories?post=646"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/tags?post=646"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}