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Help.

NotSoSmart  Apr 3, 2017
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 #1
avatar+79641 
+1

 

 

4. When two chords intersect each other inside a circle, the products of their segments are equal.

 

So....

 

7 * 4  =  5 * z     divide both sides by 5

 

[7 * 4 ] / 5   = z

 

28 / 5  =   z   =     5 + 3/5   =   5.6 

 

 

5. We can find the radius as follows :

 

6 / sin 120   =  radius / sin 30

 

6 / [  √3 / 2]   =  radius  / [ 1 / 2 ]

 

6 /  √3   =   radius  ≈ 3.46

 

And the diameter is twice this  ≈ 6.92  ≈  6.9

 

 

cool cool cool

CPhill  Apr 3, 2017

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