points, rays, lines & segments
Post on 02-Jan-2016
30 Views
Preview:
DESCRIPTION
Points, Rays, Lines & Segments. B. Point B. Y. X. Line Segment XY. X. Y. Line Segment YX. D. C. Line Segment CD. M. N. Line NM. N. M. Line MN. B. A. Ray AB. A. B. Ray BA. Naming & classifying angles. Angles. - PowerPoint PPT Presentation
TRANSCRIPT
Points, Rays, Lines & Segments
B
Point B
YX
Line Segment XY
XY
Line Segment YX
DC
Line Segment CD
MN
Line NM
NM
Line MN
BA
Ray AB
AB
Ray BA
Naming & classifying angles
Angles
An angle is formed when two rays have a common vertex.
An angle is made up of at least three points.
We can name and angle using a number or three letters
Angles
Let’s watch this quick video on naming angles:
http://www.khanacademy.org/math/geometry-1/core-geometry/v/angle-basics
Acute Angles
Measures less than 90 degrees
2
1< 2
< 1
Right Angle
Measures 90 degrees
Q R
P
< PQR or < RQP
QP
R
< RPQ or < QPR
Right Angle
Measures greater than 90 degrees
B
< 3
3
C
< ABC or <CBA A
top related