Exercise 60

In a circle with radius \( r \), \( \frac{1}{ \pi} \) times the circumference is:

  1. twice the diameter

  2. the radius

  3. the semi circumference

  4. the diameter

  5. half the radius

Try to solve it before checking the answer.

  1. the diameter

The length of the circumference is \( 2\pi r \). Hence:

\[ \frac{1}{\pi} (2 \pi r) = 2 r = \text{diameter} \]

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