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secondary 4 | A Maths
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This is the only question im having troubles with. Thank you in advance!
Realise that triangle POR is isosceles since PO = OR = radius of triangle.
So angle POR = 180° - 2θ
Use this to find segment PR's area.
(Area of Sector POR - area of triangle POR)
Subtract segment's area from semicircle to get your answer.
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