Answer:
width = 7 cm
Step-by-step explanation:
So, to find the perimeter you multiply the width by 2, multiply the length by 2, then add them together.
P = 2L + 2W
But, we already know the perimeter and length, so we need to find the width.
78 = 2(32) + 2W
78 = 64 + 2W
-64 -64
14 = 2W
/2 /2
7 = W
So, to check your answer, plug in the width (that you just found), and the length to see if you get 78, the perimeter.
P = 2L + 2W
P = 2(32) + 2(7)
P = 64 + 14
P = 78
So, yes, the width =7
