Unit 2 - Triangles Equilateral Triangles

Trainer/Instructor Notes: Triangles Scalene Triangles
Construct triangles with each set of segments as sides.
a)
b)
These segments do not create a triangle.
These segments create a triangle.
c) Describe the relationship among the lengths of the segments needed to create a
triangle.
The sum of the lengths of any two sides of a triangle must be greater than the
length of the third side.
6. In the figure, BC = BD.
A
C
1
2
Z
V W
W
L M
M N
N L
a. Why is AD > CA?
In ∆ACD, CA is opposite ∠3 and AD is opposite ∠ ACD .
∠2 ≅∠ 3 (∆BCD is an isosceles triangle.)
B
Geometry Module 2-16
V
3
Z
D