00:01
The second part of this problem asks us to find the number of square miles that were surrounded.
00:07
So when i'm doing to solve for this, it is easy, it is best to split this equation into shapes.
00:15
So we can split it into one large triangle up here.
00:20
And then we have this triangle and then this triangle.
00:23
So we have one, two, three shapes.
00:29
So the shape or the square feet.
00:34
And number one, the area of a triangle equals one half base times height.
00:41
So the base is going to be here.
00:44
So that's going to be from 800 to 400.
00:52
And the height is from here to here.
00:55
So that's going to be from negative 800.
01:00
Oh, excuse me, i'm sorry.
01:06
The base is y coordinates.
01:09
So 800 to 300...