an amateur astronomer sets up his telescope in the center of a circular field. the field is surrounded by trees 20 m tall. The tripod holding the telescope pivots 1 m above the ground. what is the lowest angle of elevation at which the astronomer can observe a star?

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step-by-step explanation:

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.

the first option is the answer.