rhombus has sides of length 10 cm. and the angle between two adjacent sides is 76 degrees. Find the lengths of the other diagona
l.
1 answer:
Let the length of one of the diagonals be 2x and the other be 2y, then
cos (76/2) = x/10
x = 10 cos 38 = 7.88 cm
sin (76/2) = y/10
y = 10 sin 38 = 6.16 cm
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1: X= 8, 2: 2/5 or 0.4
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1: 2(2x + 1) + x = x + 2x + 18
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The answer is : D
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