Across
- 3. The total distance around the triangle.
- 5. "Unlike other rules, Heron’s doesn't need the ____."
- 8. A shape with three sides and three angles.
- 9. A triangle where all three sides are different.
Down
- 1. This is exactly half of the perimeter (s).
- 2. The symbol is called a square ____.
- 4. A mathematical rule or equation.
- 6. The mathematician who created the formula.
- 7. The amount of space inside a shape.
- 9. "These are represented by the letters a,b, and c."