Let's solve the worksheet step by step and explain each answer.
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UNIT 9: SHAPES OF PLANE FIGURES
Objective: Recognize and identify the names and properties of common 2D shapes.
We are given four 2D shapes: a yellow square, a red circle, a green triangle, and a blue rectangle. For each shape, we need to fill in:
- The name of the shape
- The number of corners (vertices)
- The number of sides
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1. Yellow Shape (First Row)
Image: A yellow square
-
This 2D shape is a →
Square
-
It has ___ corners. → A square has
4 corners.
-
It has ___ sides. → A square has
4 sides.
✔ Answer:
- This 2D shape is a
square.
- It has
4 corners.
- It has
4 sides.
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2. Red Shape (Second Row)
Image: A red circle
-
This 2D shape is a →
Circle
-
It has ___ corners. → A circle has
0 corners (no sharp points).
-
It has ___ sides. → A circle has
0 sides (it’s a continuous curve).
✔ Answer:
- This 2D shape is a
circle.
- It has
0 corners.
- It has
0 sides.
> ⚠️ Note: Some might say a circle has "one curved side", but in standard elementary geometry, especially for this level, circles are said to have
0 sides and
0 corners.
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3. Green Shape (Third Row)
Image: A green triangle
-
This 2D shape is a →
Triangle
-
It has ___ corners. → A triangle has
3 corners.
-
It has ___ sides. → A triangle has
3 sides.
✔ Answer:
- This 2D shape is a
triangle.
- It has
3 corners.
- It has
3 sides.
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4. Blue Shape (Fourth Row)
Image: A blue rectangle
-
This 2D shape is a →
Rectangle
-
It has ___ corners. → A rectangle has
4 corners.
-
It has ___ sides. → A rectangle has
4 sides.
✔ Answer:
- This 2D shape is a
rectangle.
- It has
4 corners.
- It has
4 sides.
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✔ Final Completed Worksheet:
1.
Yellow shape:
- This 2D shape is a
square.
- It has
4 corners.
- It has
4 sides.
2.
Red shape:
- This 2D shape is a
circle.
- It has
0 corners.
- It has
0 sides.
3.
Green shape:
- This 2D shape is a
triangle.
- It has
3 corners.
- It has
3 sides.
4.
Blue shape:
- This 2D shape is a
rectangle.
- It has
4 corners.
- It has
4 sides.
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📌 Summary of Properties:
| Shape | Corners | Sides |
|-----------|--------|-------|
| Square | 4 | 4 |
| Circle | 0 | 0 |
| Triangle | 3 | 3 |
| Rectangle | 4 | 4 |
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✔ Explanation: This exercise helps students learn basic 2D shapes and their defining attributes — specifically the number of sides and corners (vertices). Recognizing these features builds foundational geometry skills.
Let me know if you'd like a printable version or a visual diagram!
Parent Tip: Review the logic above to help your child master the concept of plane figure worksheet.
