Question

big ideas math
#7
listen
find the area of the figure.
the area is square units.

Explanation:

Step1: Find area of full rectangle

Count grid: width=4, height=5. Area: $4 \times 5 = 20$

Step2: Find area of top triangle

Base=4, height=1. Area: $\frac{1}{2} \times 4 \times 1 = 2$

Step3: Subtract triangle from rectangle

$20 - 2 = 18$

Answer:

18