2. Rectangle l - length w - width

3. Square s – side length s s s

4. Circle r d r – radius d – diameter C - circumference

5. Parallelogram b - base h - height

6. Triangle b - baseh - height b h b h

7. Equilateral Triangle s – side length s s s

8. Rhombus d2d2 Facts: All 4 sides are congruent The diagonals bisect each other The diagonals are perpendicular to each other d1d1

9. Kite d2d2 Facts: The longer diagonal bisects the smaller diagonal The diagonals are perpendicular to each other d1d1

10. Trapezoid b 1, b 2 - bases b2b2 b1b1 h

11. Regular Polygon s – side length a - apothem Example: Regular Hexagon s s s s s s a P – Perimeter