Geometry Vocab - Intro to Proofs

Front

Complementary angles?

Back

Angles that add up to 90°.

Front

Definition of a supplementary angle?

Back

Two angles that measure 180 degrees

Front

Type of angles?

Back

Adjacent Angles

Front

Vertical angles are always:

Back

congruent (equal measures)

Front

Meaning of BISECT:

Back

To cut something into two congruent pieces or in half.

Front

Two segments with equal length are:

Back

Congruent

Front

Given the diagram, which is correct?

Back

BC+CD=BD

Front

If B is the midpoint of AC, then AB = BC.

Back

Definition of Midpoint

Front

m∠ADB + m∠BDC = m∠ADC

Back

Angle Addition Postulate

Front

If ∠A is right, then m∠A = 90°.

Back

Definition of Right Angle