Vocabulary
An angle that measures less than 90˚, but greater than 0˚.
Acute angle
The measure of supplementary angles always add to this.
180˚
The measure of complementary angles always add to this.
90˚
True or False: An angle measures 20˚, its supplementary angle measures 180.
False
The device used to measure angles.
a protractor
An angle that measures greater than 90˚, but less than 180˚.
Obtuse angle
One angle measures 80˚, what does the supplementary angle have to measure?
100˚
True or False: The following angles are complementary angles: 35˚ and 75˚.
False
Are 17˚ and 183˚ supplementary angles?
No
Two lines that will never cross or intersect are called this.
Parallel lines
An angle that measures exactly 180˚.
Straight angle
True or False: The following angles are supplementary angles: 35˚ and 145˚.
True
<1 and <2 are complementary. <1 is 8x-6 and <2 is 3x+30. What are the measurements of <1 and <2?
<1=42˚
<2=48˚
Are 50˚ and 40˚ angles supplementary?
No, they are complementary.
True or False: Vertical angles are congruent.
True
An angle measuring 90˚.
Right angle
Two angles are supplementary. <1 is 2x+3 and <2 is 6x+17. What are the measurements of <1 and <2?
43˚ and 137˚
<3 is a complement to <4. <3 is 2x+9 and <4 is 5x+18. What are the measurements of <3 and <4?
<3 is 27˚ and <4 is 63˚
Are 100˚ and 80˚ angles supplementary to each other?
Yes
Describe adjacent complementary angles.
The are side by side angles that add up to 90 degrees.
The angle formed where two lines or rays intersect at a common point.
Vertex
True or False: Supplementary angles are always made from the sum of one acute angle and one obtuse angle.
False. You could add two right angles together.
Two angles are complementary. If the ratio of the angles is 7:2, what are the angle measures?
70˚ and 20˚
Can angles be supplementary and complementary at the same time?
No
Find the value of x if you have 2 vertical angles and one measurement is 50˚ and the other is 3x+5˚.
x=15