Geometric Shapes—Complete List with Free Printable Chart — Mashup Math - Free Printable

It looks like you've uploaded an image that displays various 2D geometric shapes with their names labeled. This is an educational chart from Mashup Math, showing common two-dimensional shapes used in geometry.

Here's a breakdown and explanation of the shapes shown:

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🔹 Basic Shapes (Curved and Straight Edges)

1. Circle
- A round shape where all points are equidistant from the center.
- No sides or corners.

2. Semicircle
- Half of a circle, formed by cutting a circle along a diameter.
- Has one straight side (the diameter) and one curved edge.

3. Oval
- An elongated circle; similar to an ellipse.
- Smooth curve with no straight edges.

4. Triangle
- A polygon with three sides and three angles.
- Can be classified by sides (equilateral, isosceles, scalene) or angles (acute, right, obtuse).

5. Square
- A quadrilateral with four equal sides and four right angles (90°).
- A special type of rectangle and rhombus.

6. Rectangle
- A quadrilateral with opposite sides equal and four right angles.
- Not necessarily all sides equal (unlike a square).

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🔹 Quadrilaterals (Four-Sided Polygons)

7. Parallelogram
- Opposite sides are parallel and equal in length.
- Opposite angles are equal.

8. Rhombus
- A parallelogram with all four sides equal.
- Also called a "diamond" shape.

9. Trapezoid
- A quadrilateral with at least one pair of parallel sides.
- In some definitions, exactly one pair is parallel.

10. Kite
- A quadrilateral with two pairs of adjacent sides equal.
- One diagonal is a line of symmetry.

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🔹 Polygons with More Than Four Sides

These are polygons named based on the number of sides:

- Pentagon – 5 sides
- Hexagon – 6 sides
- Heptagon – 7 sides
- Octagon – 8 sides
- Nonagon – 9 sides
- Decagon – 10 sides

> ✔ Naming Pattern: The prefixes come from Greek:
> - *Penta-* = 5
> - *Hexa-* = 6
> - *Hepta-* = 7
> - *Octa-* = 8
> - *Nona-* = 9
> - *Deca-* = 10

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🔍 Summary Table:

| Shape | Number of Sides | Key Features |
|---------------|------------------|--------------|
| Circle | 0 (curved) | All points equidistant from center |
| Semicircle | 1 straight + 1 curved | Half of a circle |
| Oval | 0 (curved) | Ellipse-like shape |
| Triangle | 3 | Three sides, three angles |
| Square | 4 | Equal sides, 90° angles |
| Rectangle | 4 | Opposite sides equal, 90° angles |
| Parallelogram | 4 | Opposite sides parallel and equal |
| Rhombus | 4 | All sides equal, opposite angles equal |
| Trapezoid | 4 | At least one pair of parallel sides |
| Kite | 4 | Two pairs of adjacent equal sides |
| Pentagon | 5 | Five sides |
| Hexagon | 6 | Six sides |
| Heptagon | 7 | Seven sides |
| Octagon | 8 | Eight sides |
| Nonagon | 9 | Nine sides |
| Decagon | 10 | Ten sides |

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🧠 Educational Use:

This chart is ideal for:
- Teaching kids about basic geometry.
- Identifying shapes by name and appearance.
- Learning how shapes are categorized by sides, angles, and symmetry.

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Let me know if you'd like help identifying specific shapes, counting sides, or solving a related problem!