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All questions of 2D Shapes for Year 4 Exam

What is a defining characteristic of a regular polygon?
  • a)
    All sides and angles are equal.
  • b)
    It can have any number of sides.
  • c)
    It has curved sides.
  • d)
    It has unequal side lengths.
Correct answer is option 'A'. Can you explain this answer?

Defining Characteristic of a Regular Polygon
A regular polygon is a special type of polygon that has distinct properties. The correct answer to the question is option 'A':
All sides and angles are equal.
Understanding Regular Polygons
- Regular polygons are defined by their symmetry.
- They have an equal number of equal-length sides.
- The interior angles are also equal.
Examples of Regular Polygons
- Equilateral Triangle: All three sides are the same length, and all angles are 60 degrees.
- Square: Four equal sides and four right angles (90 degrees) make it a regular polygon.
Why Other Options Are Incorrect
- Option B: "It can have any number of sides."
- While regular polygons can indeed have various numbers of sides, this is not a defining characteristic.
- Option C: "It has curved sides."
- Regular polygons have straight sides, not curved.
- Option D: "It has unequal side lengths."
- This statement contradicts the definition of a regular polygon, as all sides must be equal in length.
Conclusion
In summary, the defining characteristic of a regular polygon is that all its sides and angles are equal. This property ensures that regular polygons exhibit a perfect symmetry and balance, setting them apart from irregular polygons. Understanding this concept is essential in geometry, especially for young learners in Class 4.

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