Mathematics Grade 3: Circles

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Questions and Answers

What is the relationship between the diameter and the radius of a circle?

  • The diameter is twice the radius (correct)
  • The diameter is the cube of the radius
  • The diameter is the square of the radius
  • The diameter is half the radius

What is the formula for calculating the circumference of a circle?

  • $\pi r^2$
  • $2\pi r$ (correct)
  • $\frac{1}{2} \pi r$
  • $\frac{1}{2} \pi r^2$

What is the area of a circle with radius $r$?

  • $\frac{1}{2} \pi r$
  • $\pi r^2$ (correct)
  • $2\pi r$
  • $r^2$

What is the formula for calculating the circumference of a circle?

<p>$2\ imes\pi\times r$ (D)</p> Signup and view all the answers

If a circle has a radius of 5 units, what is its circumference?

<p>$10\ imes\pi$ units (D)</p> Signup and view all the answers

In a circle, what is the relationship between the diameter ($d$) and the radius ($r$)?

<p>$d = 2r$ (D)</p> Signup and view all the answers

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