Interior Angles of Triangles Practice

Front

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

Back

The sum of the interior angles of 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

How do you find the measure of the third angle in a triangle if two angles are known?

Back

Subtract the sum of the two known angles from 180 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

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

Back

The third angle is 80 degrees.

Front

What is the definition of a triangle?

Back

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

Front

What is the relationship between the angles in a triangle?

Back

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

Front

If x + 55 = 180, what is the value of x?

Back

x = 125.

Front

What is the measure of an angle that is complementary to a 60-degree angle?

Back

The complementary angle measures 30 degrees.