# geometry

A sign is in the shape of a rhombus with a 60° angle and sides of 9 cm long. Find its area to the nearest tenth

1. 👍 0
2. 👎 0
3. 👁 580
1. base * height = 9 * 9 cos 60 = 9*4.5

1. 👍 0
2. 👎 0
posted by Damon
2. height = h
sin 60 = h/9
h = 9 sin 60
so
area = 81 sin 60 = 70.14

1. 👍 2
2. 👎 1
posted by Damon

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