The sides of the rectangle are 15 cm and 9 cm. Find its perimeter using addition and multiplication.

univerkov | January 4, 2021 | education

Method number 1.
Determine the perimeter of a rectangle if we know the length of its two sides, and we know that the rectangle has equal parallel sides.
15 + 15 + 9 + 9 = 48 cm.
Answer: the perimeter of the rectangle is 48 cm.

Method number 2.
Let us determine the perimeter of a rectangle by multiplication if we know that its parallel sides are 15 cm and 9 cm.
(15 * 2) + (9 * 2) = 30 + 18 = 48 cm.
Answer: the perimeter of the rectangle is 48 cm.

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