Question

what is the area of the letter justin made? a = 80 in.²

Explanation:

Step1: Split shape into two rectangles

We divide the "L" shape into a bottom rectangle (4 in × 10 in) and a top rectangle (5 in × 8 in). The bottom rectangle's length is $5+5=10$ in, and the top rectangle's height is $12-4=8$ in.

Step2: Calculate area of bottom rectangle

$\text{Area}_1 = 4 \times 10 = 40$ $\text{in}^2$

Step3: Calculate area of top rectangle

$\text{Area}_2 = 5 \times 8 = 40$ $\text{in}^2$

Step4: Sum the two areas

$\text{Total Area} = \text{Area}_1 + \text{Area}_2$

Answer:

$80$ $\text{in}^2$