Help so hard for me at least cuz am dumb right now

Question

A 10-foot ladder is leaning against a building.

The top of the ladder is 8 feet from the ground. Which measurement is closest to the distance from the bottom of the ladder to the wall?

Answer 1

10 - 8 - 6 is double a 5-4-3 right triangle

the bottom of the ladder is 6 feet from the bottom of the building

It's a right triangle, with the ladder's length = hypotenuse

10^2 = 8^2 + 6^2

hypotenuse squared = sum of squares of the other 2 sides

100 = 64 + 36