# Find the diameter of the circle if the radius is known a) R = 7cm b) R = 0.16 cm.?

September 14, 2021 | education

| As we well know from the school geometry course, in order to determine the diameter of a conditional circle, it is enough to use the following formula:

D = 2 * R.

a)

Let us determine what value will equal the diameter of the circle, when it is known from the condition of the problem that its radius is 7 centimeters:

2 * 7 = 14.

Answer: 14 cm.

b)

Let us determine what value will be equal to the diameter of the circle, when it is known from the condition of the problem that its radius is 0.16 cm:

2 * 0.16 = 0.32.

Answer: 0.32 cm.

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