Triangles: Classifying and Finding Missing Angles

Front

What is the sum of the angles inside a triangle?

Back

180 degrees.

Front

If two angles of a triangle are 30 and 70 degrees, what is the measure of the third angle?

Back

80 degrees.

Front

What type of triangle has one right angle?

Back

Right Triangle.

Front

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

Back

Acute Triangle.

Front

What is the measure of an angle in a right triangle?

Back

90 degrees.

Front

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

Back

Right Triangle.

Front

What is an isosceles triangle?

Back

A triangle with at least two equal sides and two equal angles.

Front

What is a scalene triangle?

Back

A triangle with all sides and angles of different measures.

Front

What is the measure of the unlabeled angle if two angles are 40 and 60 degrees?

Back

80 degrees.

Front

What is the definition of an obtuse triangle?

Back

A triangle with one angle greater than 90 degrees.