The circle below has center O, and its radius is 9yd. Given that m∠AOB = 80°, find the length of the arc ADB and the area of the shaded region. Give exact answers in terms of π, and be sure to include the correct units in your answer.
Two-dimensional figure measured in terms of radius. It is formed by a set of points that are at a constant or fixed distance from a fixed point in the center of the plane. The parts of the circle are circumference, radius, diameter, chord, tangent, secant, arc of a circle, and segment in a circle.
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