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DEFINITIONS
COMPLEMENTARY
IDENTIFICATION
TRANSVERSAL (diagram 4)
100
The measure of a right angle.
What is 90° ?
100
The complement of a 40° angle.
What is 50°?
100
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What is an obtuse angle?
100
The m<2 = 120°. This is m<3.
What is 120°?
200
An angle that is greater than 90° and less than 180°.
What is an obtuse angle?
200
The complement of a 37° angle.
What is 53°?
200
The name of this instrument or tool (diagram 1)
What is a protractor?
200
The m<2 = 120°. This is m<6.
What is 120°?
300
Two angles whose sum of their measures is 90°.
What are complementary angles?
300
The measure of congruent complementary angles.
What is 45°?
300
These pairs of angles (diagram 2).
What are complementary angles or adjacent angles?
300
<2 and <7.
What are alternate exterior angles?
400
Angles formed by perpendicular lines.
What are right angles (90 degree angles)?
400
The value of x if complementary angles measured 2x° and 3x°.
What is 18°?
400
Angles 3 and 4 (diagram 3)
What are vertical angles?
400
The m<2 = 120°. This is the reason the m<1 is 60 degrees.
What are supplementary angles?
500
The common endpoint of the 2 rays that form an angle.
What is a vertex?
500
The measures of complementary angles that measure x° and (x + 20)°.
What is 35° and 55°?
500
In the diagram, Angle 1 and Angle 5 and congruent and these types of angles (diagram 4).
What are corresponding angles?
500
The m<2 = 120°. This is m<8.
What is 60°?