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12-50.

Ingrid is standing at the Schoolyard Express chairlift, which is 412 feet from the base of the Broadway chairlift and 348 feet from the entrance to the lodge. The angle made by looking at the Broadway chairlift and the lodge is 39º. How far is the base of the Broadway chairlift from the lodge? Homework Help ✎

Draw a diagram.

Use the Law of Cosines.

≈ 261 feet