Page 8 - FLIP BOOK_TASYA NATALI SIHOMBING

Area ABCD = number of unit squares in
the rectangular area ABCD = 20 units

Gambar 1.2

The area of ABCD obtained is equal to the product of the length, and the

width.

So, area of ABCD = length x width = 5 x 4 = 20.

From the description above, we get the formula for the area of a rectangle

L = p x l

With p = Length

l = Width

L = Area of rectangle

Example Given the rectangle ABCD, the width is 2 cm less than the length. If

the perimeter is 36 cm, find:

a. perimeter of rectangle ABCD and

b. area of rectangle ABCD.

Solution:

Is known l = (p – 2) cm and K = 36 cm

K = 2(p + l)

36 = 2(p + p – 2)

36 = 4p – 4

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