Interior Angles
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Triangle Inequality

### 100

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

### 100

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

### 100

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

### 100

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

### 100

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

### 200

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

### 200

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

### 200

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

### 200

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

### 200

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

### 300

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

### 300

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

### 300

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

### 300

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

### 300

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

### 400

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

### 400

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

### 400

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

### 400

Vertical angles are...
What is congruent?

### 400

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

### 500

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

### 500

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

### 500

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

### 500

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

### 500

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