Created by StemPy Labis a diameter of a circle and measures . is a point on the circle with . How long is ?
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← A round plate has centre O. A straight crack AB runs from rim to rim and makes an angle of 28° with the line OA. A speck P sits on the longer part of the rim. At what angle does P see the two ends of the crack?Walking round a circular track, Ila passes four posts P, Q, R, S in order. The angles of the field PQRS at the first three posts are in the ratio 3 : 5 : 7. What is the angle at the post R? →
More onGeometry › Circles
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