# Re: Area help needed

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Posted by Brad Paul on October 30, 2002 at 11:52:19:

In Reply to: Area help needed posted by Jim on October 30, 2002 at 11:27:58:

: Hi all!!

: I am trying to get the area (m2)of this diagram and I cant seem to get the hang of it.

: the first triangle on the left I do the following:

: 1/2*BASE*HEIGHT or 1/2*8*(8+16.3) = 97.2 m2

: Then I go for the next one:

: 1/2*BASE*HEIGHT or 1/2*(8+16.3)*10.3 = 125.15

: Then I go for the trapezium:

: Height*sum of parallel sides or 8.6*(19.3+9) = 243.38

: The sum of that = 465.73

: Now my text book confirms that that is dead wrong, need some help all, am flustered over this.

A few things:
1) Area of a trapezium A=h(l1+l2)/2

2) Are you sure that 9 is not a 6?

3) Text books are wrong sometimes.

Try these in order and see what you get.

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