Missing angles in triangles

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

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

Back

It is a right triangle.

Front

What do you call a triangle with all angles less than 90 degrees?

Back

It is called an acute triangle.

Front

What do you call a triangle with one angle greater than 90 degrees?

Back

It is called an obtuse triangle.

Front

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

Back

The third angle measures 80 degrees.

Front

What is the missing angle if two angles of a triangle are 50 degrees and 80 degrees?

Back

The missing angle is 50 degrees.

Front

Which of the following sets of angles can form a triangle: 120°, 50°, 20° or 40°, 50°, 90°?

Back

40°, 50°, 90° can form a triangle.

Front

How do you find the missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

If a triangle has angles measuring 58 degrees and 64 degrees, what is the measure of the third angle?

Back

The third angle measures 58 degrees.

Front

What is the definition of a triangle?

Back

A triangle is a polygon with three edges and three vertices.