Question

If one side of a parallelogram whose perimeter is 42cm is 12cm the measure of its adjecent side is ​

Answer 1

Answer:

9 cm

Step-by-step explanation:

Let the adjacent side be X

12 + 12 + X + X = 42

2X = 42 - 24

2X = 18

X = 18/2

X = 9 cm

Answer 2

Answer:

9 cm

Step-by-step explanation:

Perimeter = 2(l+b)

42=2(12+b)

21= 12+b

b=9 cm