Question

a telescope rotates in a circle to capture images of different stars. find how many degrees the telescope needs to rotate to locate the star. 90° 180° 360°

Explanation:

Step1: Recall circle - angle property

A full - circle has 360 degrees, a half - circle has 180 degrees and a quarter - circle has 90 degrees. From the image, the telescope needs to rotate half of a circle to reach the star.

Step2: Determine the angle

Since it's a half - circle rotation, the angle is 180 degrees.

Answer:

180°