Angle Vocabulary
Two angles that add to 90 degrees are called ____________________.
Complementary Angles
What is the complementary angle of 25 degrees?
65 degrees 90 - 25 = 65
A flat surface that has no thickness is a ___________________.
Plane
Angle A and angle B are vertical angles. Angle A measures 30 degrees. What is the measure of angle B?
30 degrees
Angle A and angle B are a linear pair. Angle A measures 30 degrees. What is the measure of angle B?
150 degrees
Two angles that add to 180 degrees are called ______________.
Supplementary Angles
What is the complementary angle of 49 degrees?
41 degrees 90 - 49 = 41
The most fundamental building block in Geometry that indicates a location is a ___________________.
Point
Angle C and angle D are vertical angles. Angle C measures 72 degrees. What is the measure of angle D?
72 degrees
Angle C and angle D are linear pairs. Angle C measures 80 degrees. Angle D is 2x degrees. What is the measure of angle D?
100 degrees
A ray dividing an angle into two congruent angles is called a(n) __________________.
Angle Bisector
What is the supplementary angle of 103 degrees?
77 degrees 180 - 103 = 77
A midpoint is found by ______________ the endpoints.
Averaging
Angle X and angle Y are vertical angles. Angle Y measures 149 degrees. What is the measure of angle X?
149 degrees
Angles A and C are linear pairs. Angle A measures 133 degrees. Angle C measures (2x + 3) degrees. Find the measure of x.
22
Two angles which share a common ray are called ____________.
Adjacent Angles
What is the supplementary angle of 13 degrees?
167 degrees 180 - 13 = 167
The rule which tells us that two adjacent angles can be combined to form one "whole" angle is called __________.
Angle Addition Postulate
Angles A and B are vertical angles. Angle A measures (2x) degrees. Angle B is 60 degrees. Find the value of x.
30
Angle X and angle Y are linear pairs. Angle Y measures (2x + 18) degrees. Angle X measures (5x + 1) degrees. Find the value of x.
23
Two adjacent angles which form a straight angle are called a _____________ and are ______________.
Linear Pair; supplementary
What is the complement of 37 degrees?
53 degrees
The rule which tells us that two collinear segments which only share an endpoint can be combined to is called ________________.
Segment Addition Postulate
Angles A and C are vertical angles. Angle A measures (4 + 6x) degrees. Angle C is 40 degrees. Find the value of x.
6
Angles A and B are linear pairs. Angle A measures 171 degrees. What is the supplement of angle B?
171 degrees