Flashcardziz Triangle Sum Theorem

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 two angles in a triangle are 45° and 75°, what is the measure of the third angle?

Back

60°

Front

Which of the following sets of angles can form a triangle? 1) 45°, 65°, 70° 2) 150°, 110°, 100° 3) 50°, 50°, 50° 4) 90°, 90°, 90°

Back

The set 45°, 65°, 70° can form a triangle.

Front

What is the measure of the missing angle if one angle is 90° and another is 40°?

Back

50°

Front

What is the sum of the angles in a triangle?

Back

180°

Front

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

Back

It is a right triangle.

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 an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90°.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle greater than 90°.

Front

If a triangle has angles measuring 30° and 60°, what is the measure of the third angle?

Back

90°