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# trapizium Rule----P2 watch

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1. Can anyone explain the Trapezium rule? i really cant get it!

THNX ( rep to whoever can ger it STUCK in my head)
2. you use many trapeziums to estimate the area under a curve. the more you have, the more accurate the estimation.

ordinates are the lines separating the strips, and the strips are the strips.

to calculate the area, you take teh x values of the ordinates (which depends how how 'high' each strip is) and calculate the appropriate y values.

the first and last y values need to be added to 2X(the sum of the other y values).
then times that by the 'height' of each strip, divided by two.
3. Ok, but what is the diff between strips and ordinates?
4. (Original post by KOH)
Ok, but what is the diff between strips and ordinates?
The strips are the actual areas, the ordinates are the divisions.
5. (Original post by Nylex)
The strips are the actual areas, the ordinates are the divisions.

so if question said:

use the trapizium rule with 6 equally spaced ordinates, to calculate the area under the curve of equation ( y= SecX ) between (-Pi/3) and (pi/3) how we do it?
6. (Original post by KOH)
so if question said:

use the trapizium rule with 6 equally spaced ordinates, to calculate the area under the curve of equation ( y= SecX ) between (-Pi/3) and (pi/3) how we do it?
See above, that method is right.
7. (Original post by Nylex)
See above, that method is right.

Thnx.....

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Updated: June 14, 2004
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