Circumference 26361

The ABCD diamond has a circumference of 72 cm. The longer diagonal of the animal with the line segment AB angle is 30 °. Calculate the area of the ABCD diamond.

Correct answer:

S =  280.5922 cm2

Step-by-step explanation:

o=72 cm A=30  α=2 A=2 30=60    o = 4a a=o/4=72/4=18 cm  sin α = h : a h=a sinα=a sin60° =18 sin60° =18 0.866025=15.58846 cm  S=a h=18 15.5885=162 3=280.5922 cm2

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