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Question

OACB is a quadrant of a circle with centre O and radius 7 cm. If OD = 4cm, then find the area of shaded region. [3 MARKS]

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Solution

Concept: 1.5 Marks
Application: 1.5 Marks

Area of quadrant OACB =90360π×72=772

Area of ΔOAD=12×7×4

Area of shaded region = Area of quadrant OACB - area of ΔOAD

=77212×7×4

=24.5 cm2

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