Common Reasons for Proofs
Congruence Statements
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Triangle Congruence
Triangle Congruence Postulates
100

            

What mark are we allowed to make on this figure?

AB=AB  Both triangles share the same side.

100

Given this congruence statement, the angle congruent to angle V.

What is 

angleH

100

What congruent parts information would we need to know for the triangles to be congruent by ASA?

EC = DC

100

The congruence conjecture that proves these are congruent triangles.

What is SSS?

100

By what method can you prove these two triangles are congruent (if any)?

HL-Theorem

200

Given: C is the midpoint of AE. 

What parts of the two triangles are now congruent?


AC=EC

200

The side congruent to side VU

What is 

bar{HI}

200

What congruent parts would make these triangles congruent by AAS?

AC = DE

   OR

BC = FE

200

The congruence conjecture that proves these are congruent triangles.

What is SAS?

200

By what method can you prove these two triangles are congruent (if any)?


Not congruent

300

Given: 

bar{AE} text( bisects )bar{BD}

Name the parts we are allowed to mark congruent:


 

bar{BC} text( and )bar{CD}

300

A congruence statement for the two triangles represented by:

What is

triangleMNLcongtrianglePQR

300

ASA  if  <B = <E

300

Are the following triangles congruent?  If so, name the congruence conjecture that proves it.

What is AAS?

300

By what method can you prove these two triangles are congruent (if any)?


Not congruent

400

List all the ways that you can prove triangles congruent.

SSS, SAS, ASA, AAS, HL

400

Congruence statement for the triangles represented by:


What is

triangleADBcongtriangleCEB

400

Solve for x?

x=32

400

The additional information needed to prove the two triangles are congruent using HL theorem

ANGLE F has to be equal to 90*

400

By what method can you prove these two triangles are congruent (if any)?

SSS

500

   What is the reason we can mark this as true:

         ∠BCA ≅ ∠ECD


Vertical Angles

500

The side congruent to IG

What is 

bar{UW}

500

Solve for x and y

x=10

y=7

500

Are the following triangles congruent?  If so, name the congruence conjecture that proves it.

What is SAS?

500

What are ALL the ways you can prove the following triangles congruent?

ASA,AAS, SSS, HL, SAS