Foundations of Geometry

Front

What does it mean for points to be coplanar?

Back

Points are coplanar if they lie on the same plane.

Front

What is another name for line segment AB?

Back

Line segment AB can also be referred to as line AB.

Front

What is a Linear Pair of angles?

Back

A Linear Pair consists of two adjacent angles whose non-common sides form a straight line.

Front

What does it mean for points to be non-coplanar?

Back

Points are non-coplanar if they do not lie on the same plane.

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 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 straight angle?

Back

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

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect; they are equal in measure.