Transcript 04.04.ppt

Parallel lines, Transversals, and Angles
Introduction
Investigation
2
3
6
7
Ang le 1
Ang le 2
1
4
5
8
Ang le 3
Ang le 4
Ang le 5
Ang le 6
Ang le 7
Ang le 8
Angle
Angle
Angle
Sum
Acute
Right
Obtuse
General
Based on this data, can we conclude that the sum of the angles
of every triangle is some constant?
Originally, the sum of the angles of a
triangle was taken to be a line.
Use the triangles provided to give a tangible
demonstration of the original statement of the angle
sum of triangle.
H= 15.0 m
h = 4.0 m
w=3.2 m
W = 12.0 m