Question

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 1

Answer:

I don't know

Step-by-step explanation:

but the formula of radius is 2pie r²