00:01
Okay, we've got three problems here that we're going to try to fit in as quickly as we can.
00:04
So the problem, first one is these are two roads.
00:07
We have 220 feet and 190 feet and 72 degrees between them, and we want to know the area of that triangle.
00:14
We do have a formula, a, b, sine of theta, that is the side angle, side area formula for a triangle.
00:23
So we could do one -half times 190 times 225 times the sum.
00:30
Of 72 degrees.
00:32
And if we do that, we get 0 .5 times 190 times 225 times the sign of 72.
00:42
And we get 20 ,328 .8 square feet for the area.
00:52
The second question is a little bit more confusing.
00:55
We have a one boat traveling at a bearing of 330 degrees, which is essentially 30 degrees from the axis.
01:05
And it's traveling 12 miles per hour, but for 10 hours, that's 120 miles.
01:10
The other one is at 194 degrees, which would give us an angle right here of 19 .4 at 28 miles per hour.
01:21
For 10 hours, that gives us 280 miles.
01:24
And since there's 180 degrees from here to here, if i subtract 30 as well as 19 .4, i get 130 .6 degrees...