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Describing Rotations

Describing Rotations 1.14 - Solution

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To find the angle of rotation, we will start by selecting two arbitrary corresponding vertices on the preimage and image. Let's call them AA and A.A'.

Next, we will draw CA\overrightarrow{CA} and CA.\overrightarrow{CA'}.

Finally, we will measure the angle between these two rays.

We see above that the measure of the angle is 180.180^\circ.

Therefore, the angle of rotation is 180.180^\circ.