Angles and Angle Relationships Flashcard

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

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal, measuring 60 degrees each.

Front

What is a right isosceles triangle?

Back

A right isosceles triangle is a triangle that has one right angle (90 degrees) and two sides of equal length.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are pairs of angles that are on opposite sides of a transversal and outside the two lines it intersects.

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 in a triangle is 90 degrees and another is 38 degrees, what is the measure of the third angle?

Back

The third angle measures 52 degrees.

Front

What is the measure of angle b if it is complementary to a 54-degree angle?

Back

Angle b measures 36 degrees.