Find the values of y and z

first one to answer or if correct will be marked brainliest

Select the lengths in centimeters that would form a right triangle

The reflexive property of congruence lets you say that ∠pqr ≅

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how