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34 votes
34 votes
Calculate the calculate the area of a circle whose diameter is 9 cm and pie is 22/7 ​

User Alberto Adami
by
2.3k points

2 Answers

7 votes
7 votes

Answer:

63.64 cm²

Explanation:

r = d/2 = 9 / 4 = 4.5

A = πr²

A = (22/7) (4.5)²

A = (22/7) (4.5)²

A = 63.64 cm² (rounded to the hundredth place)

User Fpbhb
by
2.6k points
15 votes
15 votes

Answer: 63.64 cm² (rounded to the hundredth place)

Explanation:

Concept:

Here, we need to understand how to find the area of a circle.

The general formula is: A = πr²

π = 3.14 (or any constants that equals to this value)

r = radius = (1/2) diameter

Solve:

π = 22/7

r = d/2 = 9 / 4 = 4.5

A = πr²

A = (22/7) (4.5)²

A = (22/7) (4.5)²

A = 63.64 cm² (rounded to the hundredthe place)

Hope this helps!! :)

Please let me know if you have any question

User Mats Ekberg
by
3.4k points
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