Geometry Vocabulary

Means the same thing as postulate, a geometric idea that is accepted as true without proof.

An angle whose measure is 180 degrees.

An angle whose measure is between 0 and 90 degrees.

Two angles that add up to 180 degrees.

Angles created by intersecting lines and must always have equal measures.

What is one of the undefined terms of geometry?

An angle whose measure is less than 0 degrees or greater than 360 degrees.

Two angles that add up to 90 degrees.

An angle whose measure is 90 degrees.

Geometric figure made of any two rays with a common endpoint.

points that lie on the same line

Points that all lie on the same plane

Angles that have a common end point, a common side, but no common interior points.

An angle whose measure is between 90 and 180 degrees.

segments that have the same measure are called __________ segements.

Any figure that cuts an angle in half.

What do the formulas below help you find?

An angle whose measure is between 180 and 360 degrees.

Angles that have the same measure are called ______________ angles.

An angle whose measure is 360 degrees.