In the diagram below, BC = QR = x, AC = PR=y, and triangle PQR is a right triangle. Use the drop-down menus to complete the proof that if the equation x2 + y2 = z2 is true of the side lengths in triangle ABC, then triangle ABC must be a right triangle. Choose(1)...
x2=y2, x2+y2=PQ2, x2+y2=PR2, x2+y2=1

Choose(2)...
x2=y2 and x=y, z2=PQ2 and z=PQ

Choose(3)...
<P=<B, <P=<A, <C=<R, <C=<Q

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

take it another