2D Shapes

Two-dimensional (2D) shapes are flat shapes that only have two measurements - length and breadth. These shapes are also known as plane shapes because they exist on a flat surface, like a piece of paper or a chalkboard. The term "plane" refers to a flat, two-dimensional surface.

Examples of 2D Shapes

- Square: A square is a four-sided shape with equal length and breadth. It has four right angles.
- Rectangle: A rectangle is a four-sided shape with opposite sides of equal length. It also has four right angles.
- Triangle: A triangle is a three-sided shape with three angles. It can have different types such as equilateral (all sides and angles are equal), isosceles (two sides and two angles are equal), or scalene (no sides or angles are equal).
- Circle: A circle is a shape with no sides or angles. It is defined by a curved line called the circumference, which is equidistant from a fixed point called the center.
- Pentagon: A pentagon is a five-sided shape with five angles. All angles in a regular pentagon are equal.

Difference Between 2D and 3D Shapes

The main difference between 2D and 3D shapes is that while 2D shapes only have two measurements (length and breadth), 3D shapes have a third measurement called height or depth. 3D shapes are objects that have thickness or volume and can be seen from different angles.

Examples of 3D shapes include cubes, cylinders, spheres, and pyramids. Unlike 2D shapes, 3D shapes have faces, edges, and vertices. Faces are the flat surfaces of the shape, edges are the lines where two faces meet, and vertices are the corners or points where multiple edges meet.

Conclusion

In conclusion, the plane shapes that have two measurements - length and breadth - are known as 2D shapes. These shapes exist on a flat surface and do not have thickness or volume. Examples of 2D shapes include squares, rectangles, triangles, circles, and pentagons.