Given a circle, the radius of which is R = 7 cm. It is necessary to calculate its area.
The area of the circle (Skr) is calculated by the formula:
Scr = n * R ^ 2, where n is a mathematical constant – the number “pi”.
We calculate the area of a given circle if it is known that n = 22/7:
Scr = 22/7 * 7 ^ 2 = 22 * 7 = 154 cm ^ 2.
Answer: 154 cm ^ 2.
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