Basic Definitions
Special Angle Pairs (formed by parallel lines cut by a transversal)
Angle types
Basic Angle Pairs
Finding Missing Angles (Pictures)
100
This is represented by a straight path that extends in two opposite directions without end and has no thickness.
What is a line?
100
Angles that are in the same position on the parallel lines in relation to the transversal.
Corresponding Angles
100
This angle measures less than 90 degrees.
What is an acute angle?
100
These are two angles with a common side and a common vertex.
What are adjacent angles?
100
What is the measure of angle x?
19 degrees
200
This is formed by two rays with the same endpoint.
What is an angle?
200
These angles are inside the parallel lines and on opposite sides of the transversal.
Alternate Interior Angles
200
This angle measures to 90 degrees.
What is a right angle?
200
These are two angles whose sides are opposite rays. They are across from each other.
What are vertical angles?
200
What is the measure of angle 4?
125 degrees
300
This is part of a line that consists of two endpoints and all points between them.
What is a segment?
300
These angles are outside the parallel lines and on opposite sides of the transversal.
Alternate Exterior Angles
300
This angle measures more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
300
These are two angles whose measures have a sum of 90 degrees.
What are complementary angles?
300
What is the measure of angle x?
111 degrees
400
This is the endpoint of the angle.
What is the vertex?
400
These angles are on the same side of the transversal and inside the parallel lines.
Consecutive Interior Angles
400
This angle measures 180 degrees.
What is a straight angle?
400
These are two angles whose sum is 180 degrees.
What are supplementary angles?
400
What is the measure of angle z?
37 degrees
500
This is part of a line that consists of one endpiot and all the points of the line on one side of the endpoint.
What is a ray?
500
Angle 1 and Angle 5 have this special angle relationship
Alternate exterior angles
500
Angles with the same measure are...
What is congruent?
500
∠1 and ∠2 are vertical angles. If m∠1 = (7x + 1) ° and m∠2 = (5x + 47) ° , find m∠2.
HINT: You must solve for x first, then use x to figure out the measurement
162°
500
Find the measure of angle 1.
29 degrees