Answer:
right angle:-a Pythagorean theorem only works if the triangle is a right angle.
leg:- the two legs of a triangle are needed to complete the equation a²+b²=c²
hypotenuse:- too is needed to complete the equation too.
square root:- is used to simplify the equation at the end.
it was simplified by putting 169=x² in a square root.
Explanation: