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For each, find the radius, diameter, and circumference of the circular object (one of these measurements is given in the problem). When working with the circumference, use π and round to the nearest whole number. a. Breaking a cookie in half creates a straight side 10 cm long.radius: cmdiameter: cmcircumference: cm

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ANSWER

• radius: ,5 cm

,

• diameter: ,10 cm

,

• circumference: ,31 cm

EXPLANATION

If we assume that the cookie is round, when we cut it in half we'll have the following shape:

The straight side is the diameter of the cookie, which is 10 cm long.

The radius of a circle is half the diameter, hence the radius of the cookie is 5 cm.

The circumference is,

[tex]C=\pi\cdot d[/tex]

Where d is the diameter of the circle. In this case, this is 10cm,

[tex]C=\pi\cdot10\operatorname{cm}\approx31\operatorname{cm}[/tex]

The circumference of the cookie is 31 cm, rounded to the nearest whole number.

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