Classifying Triangles
Triangle Sum Theorem
Triangle Inequality Theorem
Angles
Missing Angles
100
This Triangle has exactly one 90 degree angle.
Right Triangle
100
The triangle sum theorem states that all angles in a triangle have a sum of _____________.
180 degrees
100
The triangle inequality theorem states that the sum of any two sides of a triangle must be ________________ than the third side.
greater
100
An angle that measures exactly 180 degrees
Straight Angle
100
x=22 degrees
200
This triangle has at least two equal sides.
Isosceles Triangle
200
Find the missing angle.
25 degrees
200
Will these side lengths create a triangle?
10, 2, 3
No
200
Angles that share a vertex and a side
Adjacent angles
200
These two angles are complementary. Solve for x
x=56 degrees
300
This Triangle has angles that measure 110, 50, and 30 degrees.
Obtuse Triangle
300
What is the measure of angle c ?
65 Degrees
300
Determine wether a triangle can be formed with side lengths 8cm, 10cm, and 16cm.
Yes
300
Angles that equal 90 degrees together.
Complementary Angles
300
These two angles are supplementary angles. Solve for x
x=50 degrees
400
This triangle has side lengths that measure 10in, 6in and 8in.
Scalene Triangle
400
What is the measure of angles d and e 
d= 65 degrees
e= 65 degrees
400
If one side of a triangle measures 23 inches and the other side 19 inches, determine possible side lengths for the third side.
4<c<42
400
Two angles that equal that 180 degrees together.
Supplementary Angles
400
Solve for x
x=85 degrees
500
Name this triangle by its sides and angles.
Obtuse, isosceles triangle
500
Solve for x
x=15
500
A triangle has side lengths 10 and 13. What are the possible side lengths for the third side?
3<c<23
500
Angles that are opposite of each other when two lines intersect.
Vertical Angles
500
Angles a and c are vertical angles. Solve for a, b, and c.
a=133 degrees
b= 47 degrees
c= 133 degrees