Question

I need help on doing this i don't really know how to do it. can someone help me?

also an explination

Answer 1

Explanation:

x is the hypotenuse of the triangle.

to find x:

the sum of the square of the other two sides. ( a^2 + b^2 = x^2)

`{x}^(2) = {21}^(2) + {20}^(2) \\ {x}^(2) = 841 \\ \sqrt{ {x}^(2) } = √(841) \\ x = 29 \: yd`