Answer:
B. 4.5
Explanation:
The sum of all interior angles of a triangle is 180 degrees
Since we know it is a right triangle, there is one angle that is 90 degrees
The acute angles are given as 8x and 12x
Add them up and isolate x to find the value of it
8x + 12x + 90 = 180 1. Add like terms
20x + 90 = 180 2. Subtract by 90 on both sides
20x = 90 3. Divide by 20 on both sides
x = 4.5