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area of semicircle - Greece Juniors 1991 p2

Source:

September 13, 2024
geometrysemicircle

Problem Statement

Given a semicircle of diameter ABAB and center OO. Let CDCD be the chord of the semicircle tangent to two circles of diameters AOAO and OBOB. If CD=120CD=120 cm,, caclulate area of the semicircle.
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