Across
- 3. Branch of mathematics dealing with shapes and their properties
- 6. A corner or point where two sides meet
- 7. A polygon with three sides
- 9. Perpendicular drawn from vertex to base
- 10. One side of a triangle, often used in basic area formula
Down
- 1. Half the sum of all sides of a triangle
- 2. The length of a closed boundary that encompasses, surrounds
- 4. A mathematical expression or equation
- 5. Greek mathematician who gave a famous formula for triangle area
- 8. The space enclosed by a shape