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Mama L [17]
2 years ago
9

In rhombus ABCD, AB=10 and the measure of angle ABC=120°. Find BD.

Mathematics
1 answer:
VLD [36.1K]2 years ago
8 0

Using the side length as the hypotenuse of a right triangle and half the given angle as the adjacent angle. Find the length of the base of a right triangle. This would be half the length of BD.

Cos(60) = adjacent leg/ 10

adjacent leg = cos(60) x 10

Adjacent leg = 5

Length of BD = 5x 2 =

10

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