00:01
Determine the area of the circles, following circles.
00:04
Use the numbers that correspond to the following symbols to help you break the code to the puzzle, which obviously we don't have the codes, but use approximation 3 .144 pi and round all your answers to the nearest hundreds.
00:19
So for our first question, first of all, what is the formula for finding an area of a circle? so the area of the circle is equals area, potta equals pi times r squared.
00:34
We also know that r is found by diameter divided by two because some of them have diameters, some of them are just radius.
00:46
So for number one, we have our area as 3 .14 times pi r squared, which is 3 .5 feet squared, and our answer turns out to be 38 .465 square feet.
01:07
Okay.
01:11
And then number two, we have a 12 centimeter, so r for this one is going to be six.
01:17
And that's going to be an area equals 3 .14 times six squared.
01:24
And we will end up with 113 .040 centimeter square.
01:36
And for number three, our area, or sorry, our radius is 11 millimeters.
01:45
So that's going to be area equals 3 .14 times 11 squared.
01:55
I need to do that one because i didn't write it down.
01:59
11 squared times 3 .14.
02:04
That's going to be 379 .940 millimeter squared.
02:18
And then the last one is diameter of 27...