00:01
In this question, we're going to use the triangulation method.
00:04
We're going to locate the epicenter of an earthquake.
00:10
So the epicenter is a location directly above where the earthquake starts, which is called the hypocenter.
00:26
So here we have the hypocenter where the earthquake starts.
00:31
And then our epicenter is just right above it.
00:48
So let's look at the circles on the right.
00:51
We're going to measure the radius of each circle in centimeters.
00:53
So for the first circle, i measured using a ruler and i got 1 .70 centimeters.
01:10
For circle b, i got 2 centimeters for the radius.
01:17
Circle c, i got 1 .50 centimeters.
01:24
We're asked to find the circumference of all three circles and add them together.
01:29
The circumference is the length around the circle.
01:34
So we're going to use a formula.
01:38
Circumference is equal to pi times diameter, where diameter is equal to two times the radius...