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posted by Rony Saturday, April 10, 2010 at 1:56pm.

The Vietnam Veterans Memorial in Washington, D.C., is made up of two walls, each 246.75 feet long, that meet at an angle of 125.2°. Find, to the nearest foot, the distance between the ends of the walls that do not meet.

Law of cosines c^2 = a^2+ b^2 - 2 a b cos C

Because this is an isosceles triangle, B and C are both 27.4°

438

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