00:01
All i like to think about is the area of a trapezoid.
00:04
Area trap is equal to one half and i always do the height times the sum of the bases.
00:12
So what you have to be careful of on this problem is that the width of each of these values is not the same.
00:19
So i guess what i'm looking at is going from one to two.
00:25
So this approximation has a width of well i need to have a one half in all these.
00:30
And really you could factor out the one half because it's going to be the same in all of them.
00:35
So the first height is one, the width of the two bases.
00:38
Then i have to add together five and six.
00:41
Then i have to add to it the next rectangle or trapezoid which going from two to 3 .25 is 1 .25 with the sum of its two bases which is six and 5 .5.
00:55
And then going from 3 .25 to 4 .5 is another 1 .25 with 5 .5 again plus its other piece of seven.
01:10
Now let me just move down here because now 4 .5 to 6 has a width of 1 .5 with a height of seven and i believe it was 8 .5.
01:20
And then the next width going from six to seven was one, 8 .5 and eight.
01:27
And then the next one seven to eight has a width of one using eight and the second height is six.
01:41
Now we're going to add to it.
01:45
I'm losing track...