Question

question 18
find the area.
10 ft
4 ft
5 ft
a 19 ft²
b 60 ft²
c 25 ft²
d 30 ft²

Explanation:

Step1: Recall the trapezoid area formula

The formula for the area of a trapezoid is \(A=\frac{(b_1 + b_2)h}{2}\), where \(b_1\) and \(b_2\) are the lengths of the parallel sides, and \(h\) is the height.

Step2: Identify the values of \(b_1\), \(b_2\), and \(h\)

From the figure, \(b_1 = 10\) ft, \(b_2=5\) ft, and \(h = 4\) ft.

Step3: Substitute the values into the formula

$$
LATEXBLOCK0
$$

Answer:

D. \(30\mathrm{ft}^2\)