PQ and RS are two lines that intersect at point T;
SEE DIAGRAM

Which fact is used to prove that angle PTR is always equal to angle STQ

a.)If two angles are equal to the same measure, then the angles are congruent

b.) If two angles are equal to the same measure, then the angles are supplementary.

c.) Lines PQ and RS have a fixed length.

d.) Lines PQ and RS intersect at right angles

Question

PQ and RS are two lines that intersect at point T;
SEE DIAGRAM

Which fact is used to prove that angle PTR is always equal to angle STQ

a.)If two angles are equal to the same measure, then the angles are congruent

b.) If two angles are equal to the same measure, then the angles are supplementary. 

 c.) Lines PQ and RS have a fixed length. 

d.) Lines PQ and RS intersect at right angles

anonymous · Answer

attachment

campbell_st · Answer

its option A... the angles are on opposite sides of a vertex and are equal in measure