Deductive Reasoning Worksheet with Answer Key

What's on the worksheet

1. Write the conclusion that follows from each set of statements and name the law used.
2. Work with rays and angles in order around a point to reach a conclusion.
3. Decide whether each argument is valid and whether its conclusion is certain.
4. Put the seven statements of a proof about a right angle in order.
5. Find AN from AB with midpoints, then prove a formula that holds for any segment.
6. Prove all four angles at crossing lines are equal, starting from one pair.
7. Use the angle sum theorem to prove a fact about angle bisectors in a triangle.