1. CIRCLE
- A circle is a round, closed shape with no sides and no corners.
- Sides: 0
- Vertices: 0
- Angles: 0
- Has one continuous curved boundary.
- All points on the boundary are at the same distance from the centre.
Examples
Coin
Clock
Plate
2. TRIANGLE
- Sides: 3
- Vertices: 3
- Angles: 3
By Sides: Equilateral, Isosceles, Scalene
By Angles: Acute (all < 90°), Right (one = 90°), Obtuse (one > 90°)
By Angles: Acute (all < 90°), Right (one = 90°), Obtuse (one > 90°)
Examples
Sign
Roof
3. SQUARE
- Sides: 4 (all equal)
- Vertices: 4
- Angles: 4 right angles (90°)
Examples
Chess
Tile
4. RECTANGLE
- Sides: 4
- Opposite sides are equal
- Vertices: 4
- Angles: 4 right angles (90°)
Examples
Door
Book
5. PARALLELOGRAM
- Sides: 4
- Opposite sides are parallel and equal
- Opposite angles are equal
Examples
Window
6. RHOMBUS
- Sides: 4 (all equal)
- Opposite sides are parallel
- Opposite angles are equal
Examples
Diamond
7. TRAPEZIUM (TRAPEZOID)
- Sides: 4
- One pair of opposite sides are parallel
Examples
Lampshade
8. KITE
- Sides: 4
- Two pairs of equal adjacent sides
- One line of symmetry
Examples
Kite
9. PENTAGON
- Sides: 5
- Vertices: 5
Examples
Badge
10. HEXAGON
- Sides: 6
- Vertices: 6
Examples
Honeycomb
11. HEPTAGON
- Sides: 7
- Vertices: 7
Examples
Coin
12. OCTAGON
- Sides: 8
- Vertices: 8
Examples
Sign
13. NONAGON
- Sides: 9
- Vertices: 9
Examples
Medal
14. DECAGON
- Sides: 10
- Vertices: 10
Examples
Coin