Cpctc Proof Practice

Fill in the blank.

• Given

• Reflexive Property

• Transitive Property

• They're the same side!!!!!! 

When does one use CPCTC?

• Before triangles are congruent

• After triangles are congruent

• Whenever one wants, there are no restrictions

• There is no such thing as CPCTC

When do you use "CPCTC in a proof?"

• ALWAYS at the beginning

• ALWAYS at the end

• It's optional

• NEver

Fill in the Reason.

• Opposite sides of a parallelogram are congruent.

• definition of parallelogram

• Prove

• CPCTC

What is reason #3? Make sure you write-in the reasons on your proofs.

• Definition of a parallelogram

• Definition of a quadrilateral

• Opposite sides are congruent property

• Opposite sides are supplementary

Determine the correct reason for statement #4.

• opposite sides of a parallelogram are congruent theorem

• all sides are parallel

• sides are congruent

• sides are supplementary

Given this information, which quadrilateral is proven?

• Parallelogram

• Rectangle

• Rhombus

• Square

What is reason #4?

• Same-side interior angles theorem

• alternate interior angles theorem

• consecutive angles theorem

• supplementary angles

Explain how you would prove that line AB is congruent to line DE

• AAS and CPCTC

• SAS and CPCTC

• ASA and CPCTC

• HL and CPCTC

State if the two triangles are congruent.  If they are, state how you know.

• A

• B

• C

• D