Question

Please help! Give detailed answer.

Answer 1

C

Explanation:

the figure is a rectangle with opposite equal sides

Consider the upper right triangle

using Pythagoras' identity

p² + 20² = 25²

p² + 400 = 625 ( subtract 400 from both sides )

p² = 225 ( take square root of both sides )

p =
`√(225)` = 15

Answer 2

C

Explanation:

Pythagorean theorem

√25²-20²=15