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Describing Rotations

Congruence and Rigid Motion

Describing Rotations 1.9 - Solution

Return to Describing Rotations

a

Let's draw the situation as seen from above.

As we can see, when the door has turned $18 0^{\circ},$ Jack is on the opposite side of the door.

b

Again, let's draw the situation as seen from above.

When the door has rotated $36 0^{\circ},$ which is a full turn, Jack is back where he started.