Properties, Definitions, and Theorems. Flashcards
If ∠ is a right angle, then m∠ABC = 90°.
Definition of a right angle
If ∠CDE is a straight angle, then m∠CDE = 180°.
Definition of a straight angle
If ∠1 & ∠2 are complementary angles, then m∠1 + m∠2 = 90°.
Definition of complementary angles
If ∠3 & ∠4 are supplementary angles, then m∠3 + m∠4 = 180°.
Definition of supplementary angles
If AB ≅ CD, then AB=CD.
Definition of congruent segments
If ∠ANG ≅ ∠PEM, then m∠ANG = m∠PEM.
Definition of congruent angles
If M is the midpoint of AB, then AM ≅ MB.
Midpoint theorem
If M is the midpoint of AB, then AM = MB.
Definition of a midpoint.
If M is the midpoint of AB, then 2AM = AB.
Definition of a midpoint
If M is the midpoint of AB, then 2MB = AB.
Definition of a midpoint
If CD is the segment bisector of AB at P, then AB ≅ PB.
Definition of an segment bisector
If BC bisects ∠ABD, then ∠ABC ≅ ∠CBD.
Definition of an angle bisector
