Geometric Two Column Proof

What is always the 1st statement in reason column of a proof?

• Prove

• Given

• Reason

• Statement

If M is the midpoint of AB, then AM = MB

• Addition POE

• Def. of Midpoint 

• Reflexive POE

• Symmetric

Tags

CCSS.HSG.SRT.B.4

How many columns are in a two-column proof?

• depends on the proof

• 5

• as many as you want

• 2

If DA bisects IE, then

• ID=ED

• IA=EA

• <IDA=<EDA

• <IAD and <EAD are right angles

Tags

CCSS.HSG.CO.C.9

Which is the correct reason for statement 1 in the proof?

• Definition of Congruent Angles

• Substitution

• Transitive Property

• Given

Tags

CCSS.HSG.CO.B.7

Which is the correct reason for statement 2 in the proof?

• Given

• Transitive Property

• Definition of Congruent Angles

• Vertical Angles are congruent.

Tags

CCSS.7.G.B.5

What is the missing statement in the proof?

• 2m∠ABD=m∠ABD+m∠ABD

• m∠ABD=m∠DBC

• m∠ABC=m∠ABC

• m∠ABD+m∠ABD=m∠ABD+m∠DBC

Tags

CCSS.4.MD.C.7

What is the missing statement in the proof?

• Subtraction p.o.e.

• Substitution p.o.e.

• Transitive p.o.e.

• Symmetric p.o.e.

What is Reason C?

• Definition of Congruence

• Definition of Vertical Angles

• Reflexive Property

• Vertical Angle Theorem

Tags

CCSS.HSG.CO.B.7

What was duplicated?

• line

• line segment

• ray

• angle

Tags

CCSS.4.G.A.1