20.which of the following angles are congruent?

A <1 and 2> B.<3 and 8> C.<4 and 5> D.<4 and 6>

21.which are parallel lines?

A.a&t B.a&n C.t&n D.a&n&t

22.if angle 3 measures 50 degrees,which of the numbered angles is also 50 degrees?

A <8 B.<5 C.<7 D.<2

23.which angles are corresponding angles?

A.<2&<7 B.<3&<8 C.<1&<8 D.4&<5

24.if the measure of <7 is 140°,what is the measure of <8?

A.140° B.120° C.40° D.20°

25.which of the following angle pairs are congruent except one.

A.alternate interior angels
B.alternate exterior angles
C.corresponding angles
D interior angles on the same side of the transversal​