Why does the formula for finding the area of a circle work? A = π r²

2 answers:

Nadusha1986 [10]3 years ago

7 0

The formula for finding the area of the circle works because they made it especially for it. I don’t really know how else to describe it, it simply just works.

loris [4]3 years ago

7 0

Answer:

See below.

Step-by-step explanation:

If we divide the circle into a large number of sectors and line them up in a straight line it will be close to a rectangle .

The area of the rectangle will be approximately the area of the circle.

If we have an infinite number of these sectors we get a rectangle whose width is the radius r of the circle. We know that the circumference of a circle is equal to 2πr, so our rectangle will be πr long and r wide. Area = πr*r = πr^2.

Draw a circle and try deriving the rectangle as above and it should be clearer.

Hope this helps.

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The first term of the sequence is already given to be 3. Use this value to obtain the second term.
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3 years ago

You have six trophies to arrange on the top shelf of the bookcase how many ways are there to arrange the trophies

e-lub [12.9K]

Answer:

So, we can do it in 720 ways.

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3 years ago

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torisob [31]

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4 years ago

At 6:00 PM, a flagpole that is 35 feet tall casts a shadow that is 50 feet long. At the same time, how long will a person's shad

sertanlavr [38]

<u>Answer:</u>

The length of the person’s shadow is 5.7ft

<u>Explanation:</u>

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Suppose the length of the person’s shadow is=d

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