Question

A ladder 13m long rests with its foot 5m from the base of a vertical wall How high up will the ladder reach?
pls answer

Answer 1

By the Pythagoras theorem AC^2 = AB^2 + BC^2 => 169=25+BC^2 144=BC^2 BC=12m

Answer 2

13^2=5^2+x^2 169=25+x^2 X^2=169-25 x=144^-2 =12