Answer:
Step-by-step explanation:
Remark
A right triangle with one other angle = 45 degrees is isosceles (two sides are equal). So the bottom line of the square is also s
Formula
s^2 + s^2 = 20^2 Add the terms on the left. Square the right.
Solution
2s^2 = 400 Divide by 2
2s^2/2 = 400/2 Simplify
s^2 = 200 Take the square root of both sides.
Answer
sqrt(s^2) = sqrt(200)
s = 14.1 or s = 10*sqrt(2)
