iMath 圖形的面積 (I) iMath Area (I)

一個正方形相架, 邊長 15 厘米, 相架的面積是多少?
一個長方形畫框, 長 1 米, 闊 50 厘米, 畫框的面積是多少?

這兩條問題容易嗎? 若你認為容易, 你必定懂得計算正方形和長方形面積的公式
正方形面積 = 邊長 x 邊長
長方形面積 = 長 x 闊

通過此活動,鞏固你對計算正方形和長方形面積的能力。至於由正方形和長方形組成的多邊形,你懂得用分割法或填補法來計算它們的面積嗎?一起來挑戰吧。


What is the area of a square picture frame, side length 15 cm?
What is the area of a rectangular picture frame, 50 cm wide and 1 cm long?

Do you find these two questions easy? If you do, you must know how to calculate the area of squares and rectangles.
Area of Square = Length x Length
Area of Rectangle = Length x Width

Through this, you can learn how to calculate the area of squares and rectangles, and of all polygons formed with them. Do you know how to calculate the area of polygons using the dissecting and fitting methods?