Question

in each example below, calculate both the a. perimeter and b. area of each composite shape. 1. 2.

Explanation:

Step1: Calculate perimeter of shape 2

Count the length of each side of the composite - shape on the grid and sum them up.
$P = 2 + 1+1 + 3+2 + 2+1+4=16$

Step2: Calculate area of shape 2

Divide the shape into two rectangles. One rectangle has dimensions $2\times4$ and the other has dimensions $2\times1$.
The area of the first rectangle $A_1=2\times4 = 8$, the area of the second rectangle $A_2=2\times1 = 2$.
$A=A_1 + A_2=8 + 2=10$

Answer:

a. Perimeter of shape 2: 16
b. Area of shape 2: 10