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3 years ago

A circle has area 841(3.14) cm^2. What is the diameter? a. cm c. 58 cm b. 29 cm d. 58 cm2

Mathematics

2 answers:

Phantasy [73]3 years ago

7 0

The answer is C. 58 centimeters.

Lapatulllka [165]3 years ago

7 0

Answer:

The answer is 58 cm.

Step-by-step explanation:

In order to determine the diameter of a circle, we need to know about the formula of the area of a circle. The area just depends on the radius of circle.

I have attached an image that shows a circle and its formula. Also we have to know that the diameter of a circle is twice its radius.

Then:

R=radius of the circle

D=diameter of the circle

A=area of the circle

$\pi=3.14 \\A=\pi R^2\\841*3.14=3.14*R^2\\841=R^2\\R=\sqrt{841}\\R=29$

Therefore:

$D=2R\\D=2*29\\D=58$

Finally, the diameter of the circle is 58 cm.

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