PQ and RS are two lines that intersect at point T, as shown below:
5
R
Which fact is used to prove that iS angle PTR is always equal to angle STO?
• If two angles are equal to the same measure, then the angles are congruent.
angles are supplementary.
O If two angles are equal to the same measure, then the
O Lines PQ and RS have a fixed length.
O Lines PQ and RS intersect at right angles.
