• #### CPCTC - Concept

##### Math›Geometry›Triangles
How to use the principle that corresponding parts of congruent triangles are congruent, or CPCTC.
• #### Flowchart Proofs - Concept

##### Math›Geometry›Triangles
How to outline a flowchart proof.
• #### Two Column Proofs - Concept

##### Math›Geometry›Triangles
How to organize a two column proof.
• #### Flowchart Proofs - Problem 2

##### Math›Geometry›Triangles
How to prove the converse of the isosceles triangle theorem with a flowchart proof.
• #### Flowchart Proofs - Problem 1

##### Math›Geometry›Triangles
How to prove that two segments are congruent in a trapezoid with diagonals.
• #### Two Column Proofs - Problem 1

##### Math›Geometry›Triangles
How to use a two column proof to show that two triangles are congruent.
• #### Two Column Proofs - Problem 4

##### Math›Geometry›Triangles
How to use a two column proof to show that two sides are congruent with overlapping triangles.
• #### Two Column Proofs - Problem 3

##### Math›Geometry›Triangles
How to use a two column proof to show that two angles are congruent with overlapping triangles.
• #### Two Column Proofs - Problem 2

##### Math›Geometry›Triangles
How to use a two column proof to show that two angles are congruent in a parallelogram with one diagonal.