Geometry
Homework – Intro to Triangles Unit Review
Can you… use the triangle sum properties?
PROVE IT!
Name______________________________
Can you… describe the possible lengths of a third si
side of a triangle given a diagram with a variable?
PROVE IT!
Find the value of x.
1.
1. Describe the possible values of x.
3x
32
20
56
x
2x + 4
2.
(x + 1)
V
U
M
119
38
x
8
(x + 5)
P
I
J
Can you… describe the possible lengths of the
Can you… solve a word problem about
PROVE IT!
PROVE IT!
1. 9 inches and 8 inches
You are bending a pipe cleaner into an isosceles
triangle. The pipe cleaner is 24 inches long and the
first bend is at 10 inches. Draw and label the two
isosceles triangles that you could create.
third side of a triangle given the other two.
2. 24 feet and 13 feet
3. 3 inches and 9 inches
4. 1 foot and 17 inches (be careful!!)
triangles?
Can you… conclude information from isosceles
and equilateral triangles?
Can you… use the exterior angle theorem?
PROVE IT!
PROVE IT!
Find the measure of the exterior angle.
1. Find the value of x and y.
1.
2x - 3
38
y+ 4
11
(7x + 1)
(10x + 9)
2. Find the perimeter.
2.
3x - 4
(2x - 8)
2x + 1
x
x+ 1
31
Can you… compare parts of a triangle using the
Can you… use information given an isosceles
PROVE IT!
PROVE IT!
Use <, >, or = to compare.
1. Find the value of x and y.
hinge theorem?
triangle?
1. LN ______ PR
M
y
(9x + 12)
N
P
91
(12x - 6)
L
87
R
Q
2. m1 ______ m2
1
2
2.
(2x - 11)
(y + 16)