Geometry Concepts

1
Geometry Concepts

• Introduction
• Point, Line, Ray, Angles

2
Point
Line

• Def set of points extending infinitely in both
  directions
• Label two points on the line

• Def location in space
• Label with capital letter

Point D
B
D
A
3
Plane

• Def a flat surface extending endlessly in all
  directions

plane BAC
4
Line Segment
Ray

• Def part of a line, one endpoint, extends
  infinitely in one direction
• Label endpoint and one other point

• Def part of a line with two endpoints
• Label the two endpoints

D
A
C
B
5
Angle

• Def two rays with a common endpoint, called
  the vertex
• Label and name in three ways

S
H
I
6
Acute
Right
Straight
Obtuse
7
Complementary angles
Supplementary angles


8
Parallel Lines
Perpendicular Lines
Def two lines that intersect to form right
angles
9
Intersecting Lines
Vertical Angles
Def Opposite pairs of congruent angles formed
by intersecting lines
10
Reflex Angle
11
Adjacent Angles
Def two angles with a common vertex and a
common side but no common interior points
12
Phew!!! Thats all, folks.