So let me write that so diameter the diameter here is 16 millimeters and they want us to figure out the area the area of the surface of this candy or essentially the area of this circle and so when we think about area we know that the area of a circle the area of a circle is equal to pi times the radius of the circle squared. How to calculate the area of a circle a common problem in geometry class is to have you calculate the area of a circle based on provided information you need to know the formula for finding the area of a circle api r2 the formula is. Calculating the area of a circle requires multiplying pi by the square of the radius if you dont have the radius you can calculate the radius using the diameter by dividing the diameter in half. Practice problem find the area and circumference of a circle with a diameter of 4 inches solution one of the first rules of solving these types of problems involving circles is to carefully note whether we are dealing with the radius or the diameter in this problem the circle is described using the diameter which is 4 inches the radius
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