Proof in Geometry

What is the missing statement in the proof?

• Addition p.o.e

• Segment Addition Postulate

• Substitution p.o.e

• Transitive p.o.e

addition POE

angle addition POE

subtraction POE

substitution POE

• addition POE

• angle addition POE

• subtraction POE

• substitution POE

What is the missing statement in the proof?

• Subtraction p.o.e.

• Substitution p.o.e.

• Transitive p.o.e.

• Symmetric p.o.e.

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

• Addition POE

• Def. of Midpoint 

• Reflexive POE

• Symmetric

When starting a proof you always start with:

• Given information

• What it wants you to prove

• Equal Angles

• Linear Angles

If <M = <L then <L = <M

• Transitive POE

• Substitution POE

• Symmetric POE

• Reflexive POE

Which property justifies the next step?

• Segment addition postulate

• Definition of an angle bisector

• Angle addition postulate

• Definition of right angles

Fill in the missing proofs.

• Transitive Property, SAS(Side-Angle-Side)

• Reflexive Property, SAS(Side-Angle-Side)

• Reflexive Property, Vertical Angles Thm.

• Transitive Property, SSS(Side-Side-Side)

What is the "statement" for step 3 of the proof? 

• ∡EDA≅∡DCB

• ∡AED≅∡BEC

• DE=CE

• ∡AED≅∡CED

What is the "statement" for step 2 of the proof?

• ∆BAC≅∆DAC

• BC=DC

• ∡B≅∡D

• ∡BAC≅∡DAC