PQ and RS are two lines that Intersect at point T, as shown below: Q
Which fact is used to prove that angle PTR is always equal to angle STQ? (1 point)
If two angles are equal to the same measure, then the angles are congruent.
If two angles are equal to the same measure, then the angles are supplementary.
• Lines PQ and RS have a fixed length. a
Lines PQ and RS intersect at right angles.

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.