Proof Properties

What is the first statement usually in a proof?

• What you want to prove

• The given

• A theorem

• A postulate

What is the last statement in a proof?

• The given

• What you are proving

• Vertical Angle Theorem

• Alt. Interior angle theorem

Tags

CCSS.8.G.A.5

Which property is used here?

• Substitution Property

• Reflexive Property

• Angle Addition Postulate

• Subtraction Property

• Addition Property

Tags

CCSS.7.G.B.5

• Reflexive

• Symmetric

• Substitution

• Commutative

Tags

CCSS.HSG.CO.C.9

• Reflexive

• Symmetric

• Substitution

• Commutative

• Reflexive

• Symmetric

• Substitution

• Commutative

Tags

CCSS.4.MD.C.7

What is the reason?

• Definition of Complementary
• Definition of 180 
• Definition of supplementary
• Angle Addition

Tags

CCSS.7.G.B.5

Which postulate or definition states that
m∠ADB + m∠BDC = m∠ADC?

• Segment Addition Postulate
• Angle Addition Postulate
• Definition of Angle Bisector
• Definition of Congruent Angles

Tags

CCSS.4.MD.C.7

If ∠1 and ∠2 are supplementary,
then m∠1 + m∠2 = 180°.

• Definition of Supplementary Angles
• Angle Addition Postulate
• Vertical Angles Theorem
• Definition of Complementary Angles

Tags

CCSS.7.G.B.5

If ∠A and ∠B are complementary,
then m∠A + m∠B = 90°.

• Definition of Supplementary Angles
• Angle Addition Postulate
• Definition of Right Angle
• Definition of Complementary Angles

Tags

CCSS.7.G.B.5