# Proof Prompt (D)

- Author:
- Tim Brzezinski

- Topic:
- Angles

**Theorem:**If

**2 angles are supplements**of

**congruent angles**(or the same angle), then

**those 2 angles are congruent**. (Feel free to move the white points anywhere on the screen you'd like.) Write a 2-column (or paragraph) proof that formally proves what this applet informally illustrates. Be sure to draw an appropriate diagram, state what is given, & state what needs to be proven. Then prove it.

## Proof Prompt (D)

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