Find the circumference and area of a circle with a diameter of 18.8 cm.
| March 25, 2021 | education
The value of the number π = 3.14 is known, as well as the diameter of the circle D = 18.8 cm.
In order to determine the circumference and area of a circle, let’s remember the formulas for finding them.
In order to find the circumference of a circle, we will use the following formula.
l = пD, where D is the diameter of the circle, and the number pi is given in the condition.
Substitute and calculate: l = 3.14 * 18.8 = 59.032 cm = 59 cm.
In order to find the area of a circle, we will use:
S = 1 / 4пD ^ 2, where D is the diameter of the circle.
S = 1/4 * 3.14 * 18.8 ^ 2 = 1/4 * 3.14 * 353.44 = 277.4504 = 277.5 cm2.
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