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Problem 4. Let SABCD be a pyramid, such that the base ABCD is a parallelogram. Let A' be the point on SA such that SA
Problem 4. Let SABCD be a pyramid, such that the base ABCD is a parallelogram. Let A' be the point on SA such that SA = 5SA', let B' be the point on SB such that SB = 4SB', and let C' be the point on SC such that SC = 3SC;. Let D' be the point of intersection of the plane ABC and the segment SD. Find the ratio SD : SD'. You will need to use the following fact: if you place masses at the points A', B', C', then their center of mass will lie in the plane ABC.Problem 4. Let SABCD be a pyramid, such that the base ABCD is a parallelogram. Let A' be the point on SA such that SA = 5SA', let B' be the point on SB such that SB = 4SB', and let C' be the point on SC such that SC = 3SC;. Let D' be the point of intersection of the plane ABC and the segment SD. Find the ratio SD : SD'. You will need to use the following fact: if you place masses at the points A', B', C', then their center of mass will lie in the plane ABC
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