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```
Date: 8/24/96 at 0:34:55
From: Anonymous
Subject: Area of Quadrilateral of Given Side Lengths

I need to find the area of a 4 sided figure with dimensions of:

a = Top side = 105
b = Right    = 230.67
c = Bottom   = 150
d = Left     = 182.5

If I draw a diagonal "z" from the top-right (intersection of a&b)
to the bottom-left (intersection of c&d) it becomes 2 triangles.
Using the law of cosines leaves me with more unknowns than equations.
```

```
Date: 8/30/96 at 13:54:15
From: Doctor Jerry
Subject: Re: Area of Quadrilateral of Given Side Lengths

You need one more piece of information before you can calculate the
area. For example, suppose I told you to find the area of a four-sided
figure with dimensions of 1 by 1 by 1 by 1.  It could be a square with
area 1 or it could be a parallelogram.  The area would be very, very
small if the parallelogram had two angles near 0.

-Doctor Jerry,  The Math Forum
Check out our web site!  http://mathforum.org/dr.math/
```
Associated Topics:
High School Geometry
High School Triangles and Other Polygons

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