Question

Grade 7 - Quarter 3 - Week 7

The center of a circle is
located at (3,-4) and the
end of a radius is located at
(-1,-4). What is the area of
the circle?
How do you solve? What formula do you use?

Answer 1

The area of the circle is around 50.24

Explanation:

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

To find r, we can use the point that is given to us. To find the distance of the radius, we can use the formula

`d=\sqrt{(x2-x1)^(2)+(y2-y1)^(2) }`

We can just plug in the points given into the formula and we get,

4.

Now we can plug 4 into the formula

`\pi r^(2)`

`(3.14)(4^(2))`

Resulting in,

around 50.24.