Question

1. 15×12 area = dashed circle (right triangle with legs 12 yd and 15 yd) area = dashed circle

Explanation:

Step1: Recall area formula for right triangle

The area of a right triangle is given by $A = \frac{1}{2} \times \text{base} \times \text{height}$. Here, base = 15 yd and height = 12 yd.

Step2: Substitute values into formula

Substitute base = 15 and height = 12 into the formula: $A = \frac{1}{2} \times 15 \times 12$.

Step3: Calculate the product

First, calculate $15 \times 12 = 180$. Then, multiply by $\frac{1}{2}$: $\frac{1}{2} \times 180 = 90$.

Answer:

90 square yards