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3 years ago

15

Determine (a) the area and (b) the circumference of the circle.

1 answer:

Inga [223]3 years ago

3 0

Step-by-step explanation:

<h2>a).</h2>

To find the area of the circle we must first find the radius using the formula

radius = diameter / 2

From the question

diameter = 21 ft

The radius is

21/2 = 10.5 ft

Area of a circle = πr²

where r is the radius

Area = π(10.5)²

= 110.25π

<h3>= 346.36 cm²</h3>

<h2>b).</h2>

Circumference of a circle = πd

where d is the diameter

Circumference = π(21)

<h3>= 65.97cm</h3>

Hope this helps you

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Thus, it is found that greatest number is $5.5 \times 10^5$ . It is greater by smallest number by 500 times.

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