Interior Angles of Triangles

Front

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

Back

180 degrees

Front

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

Back

Right triangle

Front

What is the measure of the third angle if two angles of a triangle are 30 degrees and 70 degrees?

Back

80 degrees

Front

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

Back

Acute triangle

Front

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

Back

60 degrees

Front

If a triangle has angles measuring 45 degrees and 45 degrees, what is the measure of the third angle?

Back

90 degrees

Front

What is the relationship between the angles in a triangle?

Back

The sum of the interior angles is always 180 degrees.

Front

How do you find the measure of a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

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

Back

Obtuse triangle

Front

If two angles of a triangle are equal, what type of triangle is it?

Back

Isosceles triangle