Answer:
Step-by-step explanation:
Triangle ABC is a right angle triangle that is made up of 2 right angle triangle.
To determine y, we would apply Pythagoras theorem which is expressed as
Hypotenuse² = opposite side² + adjacent side²
15² = y² + 12²
225 = y² + 144
y² = 225 - 144 = 81
y = √81 = 9
To determine z,
20² = z² + 12²
400 = z² + 144
z² = 400 - 144 = 256
z = √256 = 16
