Question

math practice test
a right - triangle has an adjacent - side length of 12 inches and an opposite - side length of 5 inches. the hypotenuse’s length is unknown. what is the area of the triangle?
15 in²
20 in²
30 in²
60 in²

Explanation:

Step1: Recall area formula for right - triangle

The area formula for a right - triangle is $A=\frac{1}{2}ab$, where $a$ and $b$ are the lengths of the two legs.

Step2: Identify the legs

The adjacent - side length of 12 inches and the opposite - side length of 5 inches are the two legs of the right - triangle.

Step3: Calculate the area

$A=\frac{1}{2}\times12\times5 = 30$ in²

Answer:

C. 30 in²