Question

unit 1 summative (area/perimeter/volume/surface area the base of a triangle is 14 in and its height is 9 in. find its area. 81 in² 63 in² 126 in² 72 in²

Explanation:

Step1: Recall the formula for the area of a triangle

The formula for the area \( A \) of a triangle is \( A=\frac{1}{2}\times\text{base}\times\text{height} \).

Step2: Substitute the given values into the formula

Given that the base \( b = 14 \) in and the height \( h=9 \) in. Substitute these values into the formula: \( A=\frac{1}{2}\times14\times9 \).

Step3: Perform the calculation

First, calculate \( \frac{1}{2}\times14 = 7 \). Then, multiply this result by 9: \( 7\times9 = 63 \). So the area of the triangle is \( 63 \) square inches.

Answer:

B. \( 63\ \text{in}^2 \) (assuming the options are labeled with letters, and the second option is \( 63\ \text{in}^2 \))