Answer:
20 in
Explanation:
Remark
This is a Pythagorean Theorem question.
Givens
a = 15 in
b = ??
c = 25 in
Formula
a^2 + b^2 = c^2
Solution
15^2 + b^2 = 25^2
225 + b^2 = 625 Subtract 225 from both sides
225-225+b^2 = 625-225 Combine
b^2 = 400 Take the square root of both sides
sqrt(b^2) = sqrt(400)
b = 20
The length is 20 in