Student Congruence Proofs

If DA bisects IE, then

• ID=ED

• IA=EA

• <IDA=<EDA

• <IAD and <EAD are right angles

If AD bisects <EDI, then

• <ADE=<IDA

• IA=AE

• ID=ED

• All of the above

In this picture,

• <BCA=<DCE because they are vertical angles and vertical angles are always congruent to each other

• <C=<C because they are vertical angles and vertical angles are always congruent to each other

• <EDC=<ACB because they are vertical angles and vertical angles are always congruent to each other

• None of the above; we don't actually have vertical angles

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

• HA=HA

• HA=AH

• MA=AM

• MA=MA

What is statement #1?

• 
• Given

• 

What is the reason for statement #1?

• Given

• Definition of Congruent Segments

• Prove

What is the reason for statement #2.

• Definition of midpoint

• Definition of congruent

• Definition of angle bisector

• Definition of segment bisector

What is the reason for statement #3?

• SAS

• Prove

• SSA

• SSS

A segment bisector cuts a segment into two congruent

• Segments!

• Angles

• Mysteries

When using hypotenuse leg (HL) in a proof, you must first state ...

• CPCTC.

• there are right triangles.

• that vertical angles are congruent.

• the reflexive property.