1

Problem

Find the perimeter of the shape.

2

Step

The given shape is a rectangle:

3

Step

The sides of a rectangle are:

l = 17 in. , w = 10 in.

4

Formula

The perimeter of a rectangle is P = 2(l + w).

5

Clue

Substitute the values by using formula:

P = 2(17 + 10)

6

Step

After multiplication we get:

P = 34 + 20

7

Step

After addition we get:

P = 54

8

Solution

Therefore, the perimeter of a rectangle is P = 54 in.

9

Sumup

Please summarize steps

Choices

10

Choice-A

Incorrect, as the correct perimeter is 54 in

Wrong 53 in

11

Choice-B

Incorrect, as the correct perimeter is 54 in

Wrong 51 in

12

Choice-C

Incorrect, as the correct perimeter is 54 in

Wrong 56 in

13

Choice-D

Correct, as the calculated perimeter is indeed 54 in

Correct 54 in

14

Step

Option

D

15

Sumup

Please summarize choices