The perimeter of the triangle ABC is 60
How to find the perimeter
To solve for the perimeter, we need to solve for side CD
We solve for CD using Pythagoras theorem we solve AD first before solving for CD
AD = √(20² - 16²)
AD = √(400 - 256)
AD = 12
CD = √(15² - 12²) = 9
Perimeter = AC + AB + BC
Perimeter = 15 + 20 + (16 + 9)
Perimeter = 60