First, find the area of the circle as a whole. Then find the percentage or fraction of that area.
STEP ONE
As you probably know, you use this formula to find the area of any circle.
We know what the radius is, so substitute the 4 for the r in the formula.
Simplify.
STEP TWO
Now that we know what the area of the circle is as a whole, let's find the fraction of that area. We want to the know the area of the shaded part.
Multiply the area by 3/4.
So, the answer is the first option.
STEP ONE
As you probably know, you use this formula to find the area of any circle.
We know what the radius is, so substitute the 4 for the r in the formula.
Simplify.
STEP TWO
Now that we know what the area of the circle is as a whole, let's find the fraction of that area. We want to the know the area of the shaded part.
Multiply the area by 3/4.
So, the answer is the first option.