Class 4 (CBSE) • MathematicsChapter 1: Shapes Around Us⭐ Topic 1
Properties of 2-D Shapes
We explore properties of 2-D shapes in more depth, like sides, angles, and whether sides are equal or parallel.
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A square has 4 equal sides and 4 right angles (90 degrees each). A rectangle has 4 sides with opposite sides equal, and also 4 right angles.
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A triangle has 3 sides and 3 angles, and different triangles can have different combinations of equal or unequal sides and angles.
Quick revision
Remember these!
- A square has 4 equal sides and 4 right angles.
- A rectangle has opposite sides equal and 4 right angles.
- A triangle has 3 sides and 3 angles.
- Different triangles have different side/angle combinations.
- Parallel sides never meet and stay the same distance apart.
- A rectangle's top and bottom sides are parallel.
- Understanding properties helps classify shapes.
- This is an important geometry skill.