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Question

post-17128

Hi ,

 

please se help on the above question . 

Thanks very much !

Fly2High 

Source: Catholic High

Answer

post-17142

The 2 triangles shown above are equilateral triangles,

so each sector is 60 degrees.

Hence, the length of the arc is 1/6 of the circumference.

Since there are 6 of such arcs, the parameter formed

by the 6 arcs is equal to the circumference of one circle.

The total parameter of the shaded figure is

8r + circumference -> (8 x 15) + 2 x pi x 15 = 120 + 30pi

1 Reply 3 Likes ✔Accepted Answer

Thanks very much BigDevil !!

1 Reply 0 Likes

Welcome!

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