Interior Angles  Label by Angle  Label by Side  More Angles  Triangle Inequality 

100What is 180 degrees
The sum of the interior angles of a triangle.

100What is a right triangle?
This triangle has a right angle.

100What is equilateral?
A triangle with 3 congruent sides is...

100What is 180 degrees?
The corresponding interior and exterior angle of a triangle add up to...

100What is BIGGER than the 3rd side?
The sum of the two shortest sides of a triangle must be...

200What is 45 degrees?
Given triangle ABC, angle B is 65 degrees, angle C is 70, and angle A is...

200What is an acute triangle?
This triangle has 3 acute angles.

200What is an isosceles triangle?
A triangle with exactly 2 congruent sides is...

200What is supplementary angles?
Two angles that add to 180 degrees.

200What is it is a triangle?
Given side lengths 7, 9, 15 determine if it is a triangle.

300What is congruent?
The base angles of an isosceles triangle are...

300What is an obtuse angle?
This triangle has an obtuse angle.

300What is a scalene triangle?
A triangle with no congruent sides is...

300What is complementary angles?
Two angles that add up to 90 degrees.

300What is it is NOT a traingle?
Given sides 4, 6, 10 determine if it is a triangle.

400What is 16?
Given triangle STU with angle S = 2x + 3, angle T = 5x, and angle U = 3x + 17, solve for x.

400What is an isosceles triangle?
The base angles of this triangle are congruent.

400What is a right triangle?
The pythagorean theorem applies to the sides of this triangle.

400What is congruent?
Vertical angles are...

400What is 3 < x < 19?
Given sides 8, 11 determine the range of the 3rd side.

500What is 120 degrees?
Given isosceles triangle JKL, base angles J and L are 3x and exterior angle L is 100 + 5x. Vertex angle K is...

500What is an equiangular triangle?
All 3 angles of this triangle are congruent.

500What is 5?
Given triangle GHT is an isosceles triangle with congruent sides 17 and 3x + 2, x is...

500What is a linear pair?
Two angles that form a straight angle...

500What is 0< x< 10?
Given sides 5, 5, determine the range of the 3rd side.
