III. Solve each problem below. 1. In the figure below, two radii OA and OB form an angle of 70° for two concentric circles with 8 cm and 5 cm radii. Calculate the area of the shaded region formed by the radii and concentric circles. B 170 А 2. A central angle of 60° is plotted on a circle with a 4 cm radius. Calculate the area of the segment between the chord joining the ends of the two radii and its corresponding arc.
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