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Which angle measures can Deshawn rotate the regular pentagon through to map it onto itself?

A. 135°
B. 120°
C. 45°
D. 180°
E. 60°
F. 270°

Answer :

The degree of rotation that maps the pentagon onto itself would be a) 72°.

To map a regular pentagon onto itself, we need to find the angles of rotation that result in the same configuration.

A regular pentagon has an order of rotational symmetry of 5, meaning it maps onto itself after rotations of 360°/5 = 72°.

Therefore, any rotation of 72° (or multiples thereof) will map a regular pentagon onto itself. The other options are not correct:

60° is less than the full rotation required.

180° will flip the pentagon over but not map it exactly onto itself.

45° is not a multiple of the pentagon's interior angle measure.

Complete Question:

A regular pentagon is rotated about its centre. What degree of rotation maps the pentagon onto itself?

a) 72°

b) 60°

c) 180°

d) 45°

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