Two-dimensional (2D) shapes are flat geometric figures that have length and width, but no depth (or height). They are called "two-dimensional" because they can be defined and measured along two axes: typically, the x-axis (horizontal) and y-axis (vertical). 2D shapes are typically found on a plane and can be drawn on paper, a board, or any flat surface.
Here are some common examples of 2D shapes:
1. Circle - A set of points that are all the same distance from a central point. A circle is a round shape that has no corners or edges.
2. Triangle - A polygon with three edges and three vertices. Triangles can be classified by angles (acute, right-angle, obtuse) or by side lengths (equilateral, isosceles, scalene).
3. Square - A four-sided polygon with equal sides and four right angles.
4. Rectangle - A four-sided polygon with opposite sides that are equal and four right angles.
5. Pentagon - A polygon with five edges and five vertices.
6. Hexagon - A polygon with six edges and six vertices.
7. Octagon - A polygon with eight edges and eight vertices.
8. Ellipse - An oval shape, which resembles a flattened circle.
9. Trapezoid (in the U.S.) or Trapezium (in the UK) - A four-sided shape with at least one pair of parallel sides.
10. Parallelogram - A four-sided shape with opposite sides that are parallel and equal in length.
2D shapes are foundational concepts in geometry and are important for understanding more complex geometric ideas, as well as for practical applications in many fields, such as graphic design, engineering, and art.
What are 2d shapes
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