Attached figure shows a circle of centre O and radius r. NOTE: Figure is not drawn to scale Points A and B belong to circumference of circle and angle AOB = 1 radian. Perimeter of shaded region is equal to 12.
It's request: (a) Find value of r (b) From above, find EXACT area of unshaded region
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Two-dimensional figure measured in terms of radius. It is formed by a set of points that are at a constant or fixed distance from a fixed point in the center of the plane. The parts of the circle are circumference, radius, diameter, chord, tangent, secant, arc of a circle, and segment in a circle.
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