Question

if a 26cm plank is used to ramp us a tencm step how far does it reach out

Answer 1

hypotenuse = 26
up side of triangle = 10
26^2 = 10^2 +x^2
x^2 = 676 -100 = 576
x = 24

Answer 2

you can save yourself some calculations if you memorize a few basic Pythagorean triples, like 5-12-13