1-4 Angle Measure

Front

What is an acute angle?

Back

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

Front

What is a vertex in geometry?

Back

The vertex is the point where two rays meet to form an angle.

Front

What type of angle measures exactly 90 degrees?

Back

A right angle.

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

An obtuse angle.

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

Back

Obtuse angle.

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

Back

Front

What is the measure of an angle that is complementary to a 30-degree angle?

Back

60 degrees, because complementary angles sum to 90 degrees.

Front

What is the measure of an angle that is supplementary to a 70-degree angle?

Back

110 degrees, because supplementary angles sum to 180 degrees.