Triangle Angle Sum

Front

What is the Triangle Sum Theorem?

Back

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

Front

If one angle of a triangle is 60° and another is 70°, what is the measure of the third angle?

Back

The third angle is 50° (180° - 60° - 70° = 50°).

Front

Can a triangle have angles measuring 150°, 110°, and 100°?

Back

No, because the sum of these angles is 360°, which exceeds 180°.

Front

What are the measures of the angles in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60°.

Front

If two angles of a triangle are 45° and 65°, what is the measure of the third angle?

Back

The third angle is 70° (180° - 45° - 65° = 70°).

Front

What is the minimum angle measure in a triangle?

Back

The minimum angle measure in a triangle is greater than 0°.

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 90°, 45°, and 45°, what type of triangle is it?

Back

It is a right triangle.

Front

What is the sum of the angles in any triangle?

Back

The sum of the angles in any triangle is 180°.