Triangles and Angles Review

Triangle Sum Theorem

100

If you are given two angles of a triangle that add up to 120 what would the third angle equal?

60

200

If you have a triangle with the missing angle equaling 45, what do the other two angles have to add up to?

135

300

You are told that two angles of a triangle are 84 and 48 degrees. What is the measure of the third angle?

48

400

The triangle has an angle given as 45 and a second angle equaling 50. What will the third angle equal?

85

Triangle Inequality Theorem

100

7,8,15

No

200

4,8,11

Yes

300

Find the range of possible measure for the third side.

8,12

4<x<20

400

Find the range of possible measure for the third side.

11,11

0<x<22

Classifying Triangles

100

True or False

Isosceles triangles only have two equal sides 

False

200

What are the 3 ways to classify triangles by their sides? (The vocabulary words)

Equillateral, isosceles, scalene

300

What are the three ways to classify triangles by their angles? (The vocabulary words)

Acute, Obtuse, Right

400

How would you classify a triangle that has two side lengths of the same value and an angle greater than 90 degrees? 

Isosceles, obtuse

Complementary, Supplementary, Vertical Angles

100

Angles that add up to 90 degrees are what?

Complementary Angles

200

Angles that add up to 180 degrees are what?

Supplementary Angles

300

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!

400

What is the supplement of two angles who measure 15 degrees and 85 degrees?

80 degrees