Triangle Sum Theorem

Front

What does the Triangle Sum Theorem state?

Back

The Triangle Sum Theorem states that the sum of all angles in a triangle is 180°.

Front

If one angle of a triangle is 90° and another is 45°, what is the measure of the third angle?

Back

The third angle is 45°.

Front

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

Back

Each angle in an equilateral triangle measures 60°.

Front

Can a triangle have two obtuse angles?

Back

No, a triangle cannot have two obtuse angles because the sum of the angles would exceed 180°.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is 180°.

Front

If two angles of a triangle are 70° and 50°, what is the measure of the third angle?

Back

The third angle is 60°.

Front

What type of triangle has one angle greater than 90°?

Back

An obtuse triangle has one angle greater than 90°.

Front

What type of triangle has all angles less than 90°?

Back

An acute triangle has all angles less than 90°.

Front

If a triangle has angles measuring 30°, 60°, and 90°, what type of triangle is it?

Back

It is a right triangle.

Front

What is the relationship between the angles in a triangle and the exterior angle?

Back

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