PQ and RS are two lines that intersect at point T:

Question

alecwilson · Answer

attachment

alecwilson · Answer

Which fact is used to prove that angle PTS is always equal to angle RTQ? (1 points)

 	
	The sum of the measures of angles RTQ and QTS is equal to the sum of the measures of angles QTS and PTS.
	Angle RTQ and angle QTS are complementary angles.
	The sum of the measures of angles RTQ and PTS is equal to the sum of the measures of angles RTP and QTS.
	Angle RTQ and angle PTS are supplementary angles.

alecwilson · Answer

My thought was Angle RTQ and Angle QTS are complementary angles

phi · Answer

they are vertical angles

But I don't see that in your list.
Definitely not complementary (which means add up to 90 degrees)

I would ask your teacher about this one.

alecwilson · Answer

i sadly cannot, i'm alone on this one :(

phi · Answer

the first one will work.

alecwilson · Answer

thank you

jim_thompson5910 · Answer

see attached