today we will look at some angle relationships!
DESCRIPTION
Today we will look at some angle relationships!. It takes two to tango!. Vertical Angles Adjacent Angles Complementary Angles Supplementary Angles. Special Angle Pairs: 1) Vertical Angles – the angles formed on opposite sides of intersecting lines. - PowerPoint PPT PresentationTRANSCRIPT
Today we will look at some angle relationships!
•Vertical Angles
•Adjacent Angles
•Complementary Angles
•Supplementary Angles
It takes two to tango!
Special Angle Pairs:
1) Vertical Angles – the angles
formed on opposite sides of
intersecting lines.
12
43
<2 and <4 are vertical angles so we know
m<2 = m<4
Vertical angles are always congruent
2) Adjacent Angles – are angles that share a common vertex and a common side.
21
1
2
12
Complementary Angles – two angles whose sum is 90 degrees
Supplementary Angles – two angles whose sum is 180 degrees
Complementary Angles
60
X
90 - 60 = X
30 = X
What is the complement of a 72 degree angle?
What is the complement of a 35 degree angle?
18 degrees
55 degrees
Supplementary Angles
38 X
X = 180-38 X = 142 degrees
360°
180°