Question

Roscoe traced around the bottom of a can to draw a circle. Tell whether each statement about Roscoe's circle is True.

Use 3.14 for T.
inches,
A. If the circle has a circumference of 6
then it has a diameter of 3 inches. B. If the circle has a diameter of 2 inches, then it
has a circumference of 6.28 inches.
C. If the circle has a circumference of 27 inches,
then it has an area of it square inches.
D. If the circle has a circumference of a inches,
then it has an area of 0.5 square inches.
E. If the circle has a radius of 1.5 inches, then it has an area of 7.065 square inches.

Answer 1

a. not true. This confuses the diameter (=2r) with the radius (=r).

b. correct. 2πr = 6.28 when 2r=2.

c. correct. if 2πr = 2π, then r must be 1, so area πr² = π1² = π

d. not true. if 2πr = π, then r must be 1/2, so area πr² = 1/4π

e. correct. if r = 1.5, then πr² = 3.14*(1.5)² = 7.065