I need the answer plzz

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

Given: transversal t passed through parrallel lines r and s. prove: < 3 = < 6 < 4 = < 8what is the next step in the proof? choose the most logicsl approach

Is a triangle with sides of length 6ft, 21 ft, 23 ft. a right triangle?