Question

Suppose the circumference of a circle is 20mm. Find its radius and area.Write the radius in the first blank and the area in the second blank. Use 3.14 for T.

Answer 1

We are given the value of the circumference of a circle to be 20 mm.

We are requested to find the radius of the circle and also the circle's area using for the value of "pi" 3.14.

We need then to recall the formula for the length of the circumverence in a circle of radius R:

Circumference Length = 2 * "pi" * R

therefore, we can solve for the radius R, knowing that the circumference is 20 mm:

20 = 2 * (3.14) * R

20 = 6.28 * R

R = 20 / 6.28

R = 3.1847... mm

So if you are asked to round this number to one decimal, you type: 3.2 mm

If you are asked to round it to two decimals, you type 3.18 mm

Now for the area of the circle:

We need to recall the formula associated with the area of a circle of radius R:

`\text{Area}-\pi R^2`

(the product o