Congruent Triangle Proof Review

What does CPCTC stand for?

• Congruent parts of congruent triangles are congruent

• Corresponding parts of congruent triangles are congruent

• Corresponding parts of corresponding triangles are corresponding

• Corresponding parts of congruent triangles are corresponding.

When can you use CPCTC?

• Before triangles are congruent

• Whenever you wants, there are no restrictions

• After triangles are congruent

• There is no such thing as CPCTC

Are these triangles congruent?

• Yes, by ASA

• Yes, by SAS

• Yes, by AAS

• No, this is the SSA one!! (We don't say bad words in Geometry)

Are these triangles congruent?

• Yes, by ASA

• Yes, by SAS

• Yes, by AAS

• No, this is the SSA one!! (We don't say bad words in Geometry)

Are these triangles congruent?

• Yes, by ASA

• Yes, by SAS

• Yes, by AAS

• Yes, by HL

Are these triangles congruent?

• Yes, by ASA

• Yes, by SAS

• Yes, by AAS

• No, they are not congruent

Answer explanation

Not enough information given!

Identify the missing statement or reason

• Reflexive Property

• Definition of Midpoint

• Given

• Vertical Angles Theorem

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

• ∡EDA≅∡DCB

• ∡AED≅∡BEC

• ∡AED≅∡CED

The triangles are congruent. Which of the following statements must be true?

• ∠A ≅ ∠D

• ∠B ≅ ∠E

△BAC ≅ △QPR. If ∠B = 2x and ∠Q = 10, find the value of x.

• 2

• 12

• 5

• 8