Question

1. parallelogram sides measure 12 cm and 9 cm. find its perimeter.

Explanation:

Step1: Recall perimeter formula for parallelogram

Perimeter = $2(a + b)$ where $a, b$ are adjacent sides.

Step2: Substitute values

$a = 12$ cm, $b = 9$ cm. So perimeter = $2(12 + 9)$

Step3: Calculate the result

$2(21) = 42$

Answer:

42 cm