5.1 Angles of Triangles

Front

What is the sum of exterior angles of a triangle?

Back

360°

Front

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

Back

180°

Front

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

Back

Right triangle

Front

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

Back

60°

Front

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

Back

70°

Front

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

Back

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

Front

If two angles of a triangle are 45° and 55°, what is the measure of the third angle?

Back

80°

Front

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

Back

Exterior angle = sum of the two opposite interior angles.

Front

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

Back

40°, 60°, 80°

Front

What is the measure of an angle that is supplementary to a 120° angle?

Back

60°