Vocabulary
What type of triangle has two congruent sides?
Isosceles triangle
What is the complement of an angle that measures 12 degrees?
78 degrees
In Triangle ABC, angle A is 37 degrees, angle B is 68 degrees, what is the measure of angle C?
75 degrees
If the two interior angles measure 26 and 134 degrees, what is the measure of the exterior angle that is outside of the unknown angle?
160 degrees
Classify the following triangle
Isosceles triangle
What is the name of a triangle with three equal sides?
Equilateral triangle
What is the supplement of an angle that measures 99 degrees?
81 degrees
In Triangle DEF, the measure of angle E is 30, angle F is a right angle, what is the measure of angle D?
60 degrees
If one interior angle is a right angle, and the other measures 45 degrees, what is the measure of the exterior angle of the unknown angle?
135 degrees
Classify the following triangle
Right triangle
What is the name of an angle that is 180 degrees?
Straight angle
Find the missing angles
Angle 1 is 122 degrees and angle 2 is 122 degrees
In Triangle GHI, if angle G is x, angle H is 2x, and angle I is 3x, what are the missing angle measures?
Angle G is 30 degrees, angle H is 60 degrees, and angle I is 90 degrees.
Find x if the two interior angles are represented by x+3 and x, and the exterior angle of the unknown angle measures 149 degrees.
x = 73
Find x
71 degrees
What is the relationship of two angles that add up to 180?
Supplementary angles
Angle A and B are complementary. Angle A is represented by x+2 and Angle B is represented by x+8. Find the angle measures.
Angle A is 42 degrees and angle B is 48 degrees
Is it possible to have two right angles in a triangle? Why or why not?
No, because two right angles add up to 180 degrees.
Explain what is the exterior angle theorem.
The exterior angle is equal to the sum of the two other interior angles that do not touch the exterior angle
Find x
103 degrees
What is the name of a triangle where all angles are less than 90 degrees?
Angle 5 is 39 degrees and angle 16 is 106 degrees
In Triangle MNO, if angle M is 3x, angle N is 2x+40, and angle I is x-20, what is the sum of the three angles?
180 degrees
Find x when two interior angles are represented by 2x and 90 degrees, and the exterior angle of the unknown angle is represented by 4x+10.
x = 40
What is an equilateral triangle?