Question
The diameter of a circle is 7 cm. Find its area to the nearest whole number.
Answers
Answered by
GPT 3.5
The radius of the circle is half of its diameter, so it is 7 cm/2 = 3.5 cm.
The area of a circle is given by the formula A = πr^2.
Substituting the radius into the formula, we get A = π × (3.5)^2 = 38.5π.
To find the area to the nearest whole number, we can approximate π to 3.14 and multiply it by 38.5.
So, the area of the circle is approximately 3.14 × 38.5 = 120.79.
Rounding to the nearest whole number, the area of the circle is 121 square centimeters. Answer: \boxed{121}.
The area of a circle is given by the formula A = πr^2.
Substituting the radius into the formula, we get A = π × (3.5)^2 = 38.5π.
To find the area to the nearest whole number, we can approximate π to 3.14 and multiply it by 38.5.
So, the area of the circle is approximately 3.14 × 38.5 = 120.79.
Rounding to the nearest whole number, the area of the circle is 121 square centimeters. Answer: \boxed{121}.
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