Triangle Sum Theorem
If you are given two angles of a triangle that add up to 120 what would the third angle equal?
60
7,8,15
No
True or False
Isosceles triangles only have two equal sides
False
Angles that add up to 90 degrees are what?
Complementary Angles
If you have a triangle with the missing angle equaling 45, what do the other two angles have to add up to?
135
4,8,11
Yes
What are the 3 ways to classify triangles by their sides? (The vocabulary words)
Angles that add up to 180 degrees are what?
Supplementary Angles
You are told that two angles of a triangle are 84 and 48 degrees. What is the measure of the third angle?
48
Find the range of possible measure for the third side.
8,12
4<x<20
What are the three ways to classify triangles by their angles? (The vocabulary words)
Acute, Obtuse, Right
Select all that are true- Vertical angles:
A) add up to 180
B) add up to 90
C) are always congruent
D) are always found in triangles
C) Vertical angles are congruent!
The triangle has an angle given as 45 and a second angle equaling 50. What will the third angle equal?
85
Find the range of possible measure for the third side.
11,11
0<x<22
How would you classify a triangle that has two side lengths of the same value and an angle greater than 90 degrees?
Isosceles, obtuse
What is the supplement of two angles who measure 15 degrees and 85 degrees?
80 degrees