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freeballa
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Homework Statement
This isn't really homework, but a not assigned problem out of my mathbook which is kinda confusing me..
#74. We have two pairs of parallel lines in R^2 defined by the linear equations below:
a1x + b1y = r1
a1x + b1y = s1
a2x + b2y = r2
a2x + b2y = s2
We assume that these lines enclose a parallelogram P. Find the very simplest formula for the area of P in terms of a1, b1, a2, b2, r1, r2, s1, s2.
Homework Equations
The Attempt at a Solution
Not sure how to attempt this problem because there are 4 equations for two lines?