Question

A ladder 17 m long is at distance of 15 m away from wall what is the height of wall?

Answer 1

here 17 M long ladder is the hypotenuse of triangle and 15 M away from the wall it is the adjacent side of the triangle
by the Pythagoras theorem
hypotenuse 2=first side square + second side square
17square=15 square + second square
289=225+x square
x square=289-225
x square=64
x=8
that's why the height of the world is 8 m