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¿Question #228485?
Blinko: From Freaks and Geeks: If the longer diagonal of a rhombus is 10 and the large angle is 100 degrees, what is the area of the rhombus?

Woelf: 40.72
Chris%20Page: Fairly straightforward. Given one angle and leg length of the right triangle that makes a quarter of the rhombus, you can use the tangent function to find the other leg length. Now you've got the base and height of one of the triangles, so four times the area formula of the triangle gives you the area of the rhombus.