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length of AD = AB = BC = CD = BD = 20 cm

ABCD is a rhombus, with ∠ DAB = ∠ BCD = 60º

∠ ABC = ∠ ADC = 120º

Note all the four angles adds up to 360º. And each sectors of the shaded parts in each circle added up to form a single circle. 

So area of shaded parts = area of a single circle = 3.14 (10)² cm²= 314 cm²

 

1 Reply 2 Likes ✔Accepted Answer

Thanks Waterflow!

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