Triangles, Interior Angle Sum of Triangles and Exterior

Front

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______.

Back

180°

Front

What is the measure of the third angle in a triangle if the first angle is 34° and the second angle is 101°?

Back

45°

Front

What is the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two opposite interior angles.

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.

Front

What is the formula to find the measure of an interior angle of a triangle?

Back

Front

In a triangle, if one angle measures 60° and another measures 50°, what is the measure of the third angle?

Back

The third angle measures 70°.

Front

What is the relationship between the angles of a triangle and its exterior angles?

Back

Each exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

If a triangle has angles measuring 45°, 45°, and x°, what is the value of x?

Back

x = 90°.

Front

What is the measure of an angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60°.

Front

If the angles of a triangle are in the ratio 2:3:4, what are the measures of the angles?

Back

The angles measure 40°, 60°, and 80°.