angle relationships and angle proofs

Question 1

supplementary angles add up to ___ degrees

Answer 1

180 degrees

Question 2

complementary angles add up to ____ degrees

Answer 2

90 degrees

Question 3

less than 90 degrees is a ____ angle

Answer 3

acute

Question 4

90 degrees is a _____ angle

Answer 4

right

Question 5

between 90-180 degrees is an _____ angle

Answer 5

obtuse

Question 6

a straight line is _____ degrees

Answer 6

180

Question 7

greater than 180 degrees is a _____ angle

Answer 7

reflex

Question 8

congruent angles have the _____ measure

Answer 8

same

Question 9

how can we prove lines are parallel?

Answer 9

• if alternate interior, alternate exterior, or corresponding angles are congruent
• if same side interior or exterior angles are supplementary

Question 10

if we are given that the lines are parallel ….

Answer 10

• we can state that alternate interior/ exterior angles and corresponding angles are congruent
• we can also state that same side interior/ exterior angles are supplementary if the lines are parallel

Question 11

corresponding angles postulate

Answer 11

when parallel lines are cut by a transversal, corresponding angles are congruent

Question 12

corresponding angles CONVERSE

Answer 12

when corresponding angles are congruent, the lines are parallel