Question

find the perimeter of the figure.
(the figure has dimensions: 3 in., 8 in., 12 in., 4 in. )

Explanation:

Step1: Find the missing horizontal side

The total bottom horizontal length is 12 in, and the top shorter horizontal side is 3 in. The missing horizontal side length is $12 - 3 = 9$ in.

Step2: Find the missing vertical side

The total left vertical length is 8 in, and the right shorter vertical side is 4 in. The missing vertical side length is $8 - 4 = 4$ in.

Step3: Sum all side lengths

Add all the outer side lengths: $8 + 12 + 4 + 9 + 4 + 3$
Calculate the sum: $8+12=20$, $20+4=24$, $24+9=33$, $33+4=37$, $37+3=40$

Answer:

40 inches