Mar. 25-28

Grade 7 Problem of the Week Mar.25-28

1a)  Find the circumference of a circle with a diameter of 15 mm.

 b) Find the circumference of a circle with a radius of 7.5 cm

 c) The diameter of a nickel is 2 cm. What is the circumference?

 d) The radius of a circular rug is 1.3 m. What is the circumference?

2. The circumference of a circle is 15.7 centimeters. What is the diameter?

3. The circumference of a compact disc is 28.26 centimeters. What is the radius?

4. Explain the approximate relationship between the diameter and circumference, or the radius and the circumference of a circle without using pi, 314, or the formula.