Parviz F. answered • 12/05/13

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Mathematics professor at Community Colleges

°

Central angle of each sector = 360/ 7 = 51.4°

Sin (51.4 ° / 2) = (1.25/ 2 )/ r

Sin( 25.7°) = 0.625 r

0. 43/ 0.625 = r

r/2 = 0.69

d = 4(0.69) = 4( 0.69) = 2.79"

This is a trigonometry problem . You should draw a sector of 51.4° degree, and see the rissoles triangle

with 2 sides equal the radius, and the central angle of 51.4°.

Richard T.

Just in my vision I see the circle would have a diameter close to 3 inches.

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12/06/13

Richard T.

Thanks for your answer Parviz F. I think it is close to exact. Trig tables can differ I have noticed so that may account for the slight error. Another answer is 2.880 inches from Moneypenny, a dreadful speller by the way, if she is there. Get that head
of yours into a good English dictionary.

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12/06/13

Richard T.

Parvis F, as for you spelling of the isosceles triangle, well you might well Google types of triangles. There are only three and they must be spelt correctly.

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12/06/13

Richard T.

12/06/13