Learning task: Proving statements on triangle congruence

When do you use "CPCTC" in a proof?

• At the beginning

• At the beginning

• At or near the end

• Never

Tags

CCSS.HSG.SRT.B.5

What are the two-column labeled in a proof?

• Reasons / Proof

• Reasons / Given

• Statements / Postulates

• Statements / Reasons

Tags

CCSS.HSG.SRT.B.5

∠AOC≅∠COB  WHAT PROVES YOUR STATEMENT?

• DEFINITION OF ACUTE ANGLE

• DEFINITION OF A MIDPOINT

• DEFINITION OF ANGLE BISECTOR

Tags

CCSS.HSG.CO.C.9

RN≅RN  

WHAT PROVES YOUR STATEMENT?

• TRANSITIVE PROPERTY

• SYMMETRIC PROPERTY

• REFLEXIVE PROPERTY

Tags

CCSS.HSG.SRT.B.5

• TRANSITIVE PROPERTY

• SYMMETRIC PROPERTY

• REFLEXIVE PROPERTY

Tags

CCSS.HSG.SRT.B.5

A segment with endpoints on the vertex of a triangle and the midpoint on the opposite side.

• SEGMENT BISECTOR

• MEDIAN

• ANGLE BISECTOR

• MIDPOINT

Equilateral triangles are triangles with noncongruent sides.

• TRUE

• FALSE

Tags

CCSS.4.G.A.2

All the other proofs have to do with triangle congruence. What are the ways to prove triangle congruence?

• AAA, ASA, SAS, SSS, and HL

• AAA, ASA, SAS, SSS, and HL

• AAS, ASA, SAS, SSS, and HL

• SSA, ASA, SAS, SSS, and HL

Tags

CCSS.HSG.SRT.B.5

If you are proving triangles are congruent by SSS, your proof must have three statements showing that corresponding sides are congruent. You are looking for three marked congruent sides, three labeled congruent sides or two of those and one common side. The final reason for this proof would be:

• Proved!

• Done or Finished.

• The triangles are congruent

• SSS Theorem

Tags

CCSS.HSG.SRT.B.5

The first step of a proof is always______

• The introductory statement

• The concluding statement

• The given statement