Question

Explain the question.​

Answer 1

If the diameter is 8cm the area would be:

A~ 50.27cm squared

You can used the letter A

Answer 2

16π (option C)

Explanation:

So, the diameter of a circle is the length from one side of the circle to the other. (You can think of this as the width of a circle)

When measuring the area of a circle, we calculate using a circle's radius.

The radius of a circle is the distance between the center point of a circle to the outside/border/edge of a circle.

Consider what we know about diameter and radius--the radius is simply half of the diameter.

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The area of a circle is
`\pi r^(2)`

`\pi` is called "pi", which is a mathematical constant of the ratio of a circle's circumference to the diameter of a circle.

(the circumference of a circle always has a ratio of about 3.14159... , which is what we call π / pi)

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So, if the diameter is 8cm, we know that the radius is 4cm, meaning we are able to plug our radius into the formula for the area of a circle (πr²)

if r = 4

area = πr²

area = π · [4]²

area = π · 16

area = 16π

(think of π as a variable, you would put 16v instead of v16, so you put _π instead of π_)

So, the area of this circle, in square centimeters, is 16π