The point A and B lie on the circumference of a circle with centre O. the area of the circle is 81πcm². The length of the major arc is 15πcm.

Calculate:

a) The radius of the circle
b) The length of the minor arc, giving your answer in the form lπcm².
c) The acute angle​


Answer :

Answer:

a)9cm

b)

[tex]3\pi[/tex]

c)60°

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