Posted by Enoch on Tuesday, January 11, 2011 at 9:21pm.
the diagonals of a rectangle are 12 inches long and intersect at an angle of 60 degrees. find the perimeter of the rectangle. please help :)

geometry  helper, Tuesday, January 11, 2011 at 10:01pm
The angle bet. the diag. and the long
side = 30 deg.
The diagonal forms two 306090 triangles
L = sin 60 = op/hy = a/12
L = .87 = a/12
L = a = 10.44
W = sin 30 = b/hy = b/12
W = .50 = b/12
W = b = 6
P = 2*10.4 + 2*6 = 32.8in.