. A circular garden has a diameter of 204 centimeters. (Use to answer Parts A and B.) Part A: To find the length of the border around the garden, the circumfe

Question

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the circumference must be determined. What is the circumference of this garden? Show all work.

The circumference of the garden is _________________.

Part B: To determine the amount of fertilizer needed, the area must be determined. What is the area of this garden? Show all work.

The area of the garden is _________________.

Answer 1

The circle circumference formula is 2rπ, or dπ (since twice the radius IS the diameter).

π is usually rounded to 3.14, so that leaves you with C_circle = 204 * 3.14. Solve that and you have A down.

 

The circle's area is πr², so we need to halve the diameter, then square it:

204 / 2 = 104

104 * 104 = 10,816

Now multiply that by 3.14, and you'll have the area. Remember your units will be cm², too (because you're also multiplying cm * cm)!