Let’s go step by step to find which shapes are polygons.
First, remember the rules for a polygon:
- It must be 2-dimensional (flat shape).
- All sides must be straight — no curves!
- The shape must be closed — meaning the lines connect all the way around with no gaps.
- It must have more than two sides.
- The lines cannot cross each other.
Now let’s look at each shape one by one:
1.
Top left – oval: This has curved sides → NOT a polygon.
2.
Middle top – diamond (rhombus): 4 straight sides, closed, no crossing → YES, it’s a polygon.
3.
Top right – square: 4 straight sides, closed → YES, it’s a polygon.
4.
Middle left – pentagon: 5 straight sides, closed → YES, it’s a polygon.
5.
Middle right – triangle: 3 straight sides, closed → YES, it’s a polygon.
6.
Bottom middle – open triangle-like shape: One side is not connected — it’s open → NOT a polygon.
7.
Bottom left – bowl-shaped figure: Has a curved side → NOT a polygon.
8.
Bottom right – two lines forming an angle: Only 2 sides and not closed → NOT a polygon.
So, the polygons are:
- Diamond (rhombus)
- Square
- Pentagon
- Triangle
Final Answer:
Circle these four shapes: the diamond, the square, the pentagon, and the triangle.
Parent Tip: Review the logic above to help your child master the concept of polygon or not worksheet.
