Tuesday, January 27, 2009

area bounded by |x| + |y| = 20

|x| + |y| = 20
corresponds to
x + y=20
x - y=20
-x + y=20
-x -y =20
the graph is shown below

required area = 4*area of right triangle

= 4 * (1/2) *20 * 20 =800 sq. units
please leave your comments below
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