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Mathematics 4 Online
OpenStudy (anonymous):

In a diagram, AOBC is a semicircle with centre O and radius 4 cm. APD is a sector of a circle with centre P and radius 6 cm. It is given that OC is perpendicular to AOB. Calculate: (use pi: 3.142) (a) the perimeter in cm, of the shaded region (b) the area in cm of the shaded region.

OpenStudy (anonymous):

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