Question

Brett has leaned a five-meter-long ladder against his house to paint a window. He placed the base of the ladder 3m away from the wall. How far up is the window?

Answer 1

think 3-4-5 right triangle

Answer 2

And in-case you don't know about 3,4,5 Pythagorean triples, the longest side of the triangle is the ladder (at 5 m) : )

Answer 3

It is the Pythagorean theorem (A^2+B^2=C^2) the C being the hypotenuse (5m) where a and b are the other two sides. You would get the equation (A^+9=25)then you subtract 9 from both sides(A^2=16) then you find the square root of 16 which is 4 (A= 4m)