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TEA [102]
3 years ago
14

A regular polygon has possible angles of rotational symmetry of 20°, 40°, and 80°. How many sides does the polygon have?

Mathematics
1 answer:
liq [111]3 years ago
7 0
The answers 18 sides.
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What is the exterior angle?
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Answer:

angle YUT = 120

Step-by-step explanation:

in Triangle SUT

angle 70 + angle 50 + angle x = 180

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angle SUT = 60



angle SUT + angle YUT = 180 ( straight line)

60 + x = 180

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Therefore angle YUT ( exterior angle ) = 120

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