Ximpledu

Two-Column Proof

See how to write two-column proof.
1 example and its solution.

Two-Columm Proof

Definition

StatementReason
Given
Prove
Two-column proof is a way
to prove a statement.

How to:
Start from the given statement(s).
Then derive the Prove statement
by using logic (known theorems, laws, etc.).

Example

Given: m∠1 + m∠2 = 90
m∠2 + m∠3 = 90
Prove: ∠1 ≌ ∠3

Solution