Question

Can someone please help with this question

Answer 1

The Pythagorean Theorem is a^2 +b^2 = c^2, where a and b are the sides and c is the hypotenuse ( angled line).

3.

a^2 + 6^2 = 18^2

a^2 + 36 = 324

a^2 = 324 - 36

a^2 = 288

a =√288

a = 12√2

4.

a^2 + 3^2 = 9^2

a^2 + 9 = 81

a^2 = 81-9

a^2 = 72

a = √72

a = 6√2