Respuesta :

makchtoth

Answer:

84

Step-by-step explanation:

I just use an online calculator.-

www.calculator.net/triangle-calculator

gonzualex7
Let perpendicular = x and base = 13
So, P² = H² - B²
Or, x² = 85² - 13²
Or, x² = 7225 - 169
Or, x² = 7056
i.e x = = 84
Hence, the third number to make it right triangle = 84 Answer