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investigate the relationship between the diameter and circumference of a circle.

investigate the relationship between the diameter and circumference of a circle. circumference – the perimeter of a circle diameter – the distance across a circle through the center radius – half the diameter. Circumference & Diameter. Symbol for pi  π

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investigate the relationship between the diameter and circumference of a circle.

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  1. investigate the relationship between the diameter and circumference of a circle.

  2. circumference– the perimeter of a circle • diameter – the distance across a circle through the center • radius – half the diameter Circumference & Diameter

  3. Symbol for pi  π π = circumference ÷ diameter = 3.14 Formula for finding the circumference of a circle is: C = π x d Want some pi?

  4. Calculate the circumference of a circle with a diameter of 8.15 cm. • C = π x d • C = 3.14 x 8.15 • C = 25.59 cm Example

  5. Calculate the circumference of a circle with a diameter of 6.5 cm. • C= 20.41 • Calculate the circumference of a circle with a diameter of 62.5654 cm. • 196.46 Your Turn

  6. What do you do if you know the circumference and are trying to find the diameter? • Use the following formula: d = c ÷ π Other Way

  7. Page – 211 – 213 # 1, 2, 3, 4, 5, 8, 9, 12, 13, 15 Work on

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