Concept Side C is always the side opposite to the right angle ⇒52+t2=132 25+t2=169 t2=169−25 t2=144 Take the square root of both sides to get rid of the power 2 √t2=√144 t=12 NOTE: The result of a square root is simply the number when multiplied by itself will give the number you are calculating the square root of Thus √144=12 since 12×12 gives 144