Question

What is the sum of the areas of circle C and circle D? 7Pi units squared 14Pi units squared 49Pi units squared 98Pi units squared

Answer 1

Answer: the answer is D 98πunits squared

Explanation:

Answer 2

`98 \pi \ unit^(2)`

Explanation:

Given circles are attached.

From the graph, we see that both circles must measure the same, because they are same radius of 7cm. So, using the definition of the area of a circle, we have:

`A=\pi r^(2) \\A=\pi (7)^(2)=49 \pi \ unit^(2)`

Each area is
`49 \pi \ unit^(2)`, as we deducted, both circles are equal, they have the same radius. Therefore, the total area is the sum of both of them:
`49 \pi + 49 \pi = 98 \pi`

So, the right answer is the last one.