1.2 - Define and Measure Angles

Question 1

A ___ is a part of a line that starts at an endpoint and extends forever in one direction.

Answer 1

ray

Question 2

An _____ is formed by two line segments or rays that share the same endpoint.

Answer 2

angle

Question 3

A ______ of an angle is the common endpoint of the two rays that form the angle.

Answer 3

vertex

Question 4

________ ______ are two angles in the same plane with a common vertex and a common side, but no common interior points.

Answer 4

adjacent angles

Question 5

less than 90 degrees

Answer 5

acute

Question 6

90 degrees

Answer 6

right

Question 7

higher than 90 degrees

Answer 7

obtuse

Question 8

180 degrees

Answer 8

straight

Question 9

The measure of the ______ angle of a given acute, right, or obtuse angle will be greater than 180 degrees and less than 360 degrees.

Answer 9

reflex

Question 10

The _____ ________ of an angle bisects the angle.

Answer 10

angle bisector

Question 11

Two angles are _____________ if the sum of their angle measures is equal to 180 degrees.

Answer 11

supplementary

Question 12

Two angles are _____________ if the sum of their angle measures is equal to 90 degrees.

Answer 12

complementary