Shapes are named by how many sides they have. A triangle has 3, a square and a rectangle have 4, a pentagon has 5 and a hexagon has 6.
A flat shape with straight sides has the same number of corners as sides. A hexagon has 6 sides and 6 corners.
Some shapes have curved sides. A circle has one curved side and no corners at all, so it is not like the others. Shapes with straight sides and many corners can look a bit like circles, like an octagon with 8 sides.
Worked example
How many corners does a pentagon have?
- A pentagon has 5 sides.
- It has the same number of corners as sides.
Answer:5 corners
Key words
- pentagon
- a shape with 5 sides
- hexagon
- a shape with 6 sides
- corner
- a point where two sides meet
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Common Core-referenced: 1.G.A.1