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    Trigonometric Functions: specifically area of minor segments

    The question is "The dartboard above has a radius of 23 cm. The shaded area has a height of 7mm. If a player must hit the shaded area to win, find: a) The area of the shaded part, to the nearest square centimetre The answer is 5cm^2, but I don't know how to get there. Please halp :) *If...
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