2D and 3D Shapes
6 Minutes
2D and 3D shapes for kids: learn the difference between two and three dimensions using length, breadth, and height. A short maths lesson in English.
- Hari finds a magic pen that brings drawings to life as 2D shapes
- How 2D shapes have two dimensions: length and breadth
- How 3D shapes add height to length and breadth to look solid
What this lesson teaches
Two-dimensional and three-dimensional shapes are forms defined by the number of dimensions needed to measure them. A two-dimensional shape has two dimensions, while a three-dimensional shape includes a third dimension that makes it appear solid.
Two-dimensional shapes
A two-dimensional shape, shortened to 2D, is a flat figure that possesses only two measurements: length and breadth. When a figure is drawn using only length and breadth, it lies completely flat against the paper without any thickness. These two dimensions are enough to give a shape its outline, but they do not give it any fullness or body.
Three-dimensional shapes
A three-dimensional shape, shortened to 3D, is a figure that possesses three measurements: length, breadth, and height. Adding height to length and breadth gives an object extra size and makes it look big, thick, and solid. This extra dimension makes a 3D shape stand out with body, looking normal and filled out like a puffed puri.
Example from the lesson
- Hari draws a picture of himself using a magic pen, and the drawing comes to life looking completely flat on the page.
- The drawing explains that it is flat because it was made as a 2D shape with only length and breadth.
- Hari turns the top of the pen to switch it from the standard setting to the 3D option.
- Drawing over the flat shapes with the 3D option adds height, causing the figures to become raised and solid.
Summary of dimensions
- 2D stands for two dimensions, which are length and breadth.
- 3D stands for three dimensions, which are length, breadth, and height.
- Length and breadth are sufficient to form flat shapes on paper.
- Height is the necessary third dimension that transforms flat drawings into solid forms.