Download Section 1.5 - SharpSchool

Bell Ringer: Quiz Review
• 1.) Define
a.) Collinear
b.) Coplanar
c.) Acute
Solve for x
2.)
2x + 1
15
B
A
3.)
A
B
d.) Obtuse
e.) Right
AC = 8X + 4
C
D
2x + 1
<ABC = 10x - 15
C
Section 1.5
Don't go around saying the world
owes you a living. The world owes
you nothing. It was here first.
Mark Twain
• Adjacent Angles – Two angles in
the same plane with common
vertex and side, but no common
interior points (they don’t overlap)
D
A
B
C
• Vertical Angles – Two non
adjacent angles with a common
vertex, but no common sides.
(Formed by intersecting lines)
• Always Congruent ( =)
D
B
A
C
E
• Linear Pair – Two angles formed
by a straight line, two adjacent
angles whose non common sides
are opposite rays.
D
A
B
C
• Complementary angles – Sum of 90
Part A + Part B = 90
• Supplementary angles – sum of 180
Part A + Part B = 180
• Perpendicular Lines – Two lines
that form a right (90 degree)
angle
• Symbol:
Can you find each type of angle?
Adjacent
A
B
G
Linear Pair
60
90 H
30
30
90
60
E
Supplementary
Vertical
D
C
• Angle Bisector - splits an angle
into two equal parts.
< ABD = < DBC
A
D
B
C
Class Work
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# 7 – 15
# 25 - 30