Asked by Jo

How many lines of symmetry does a regular decagon have?

0
5
10
20

I believe the answer is 10. Thanks for the help :)
Answered by rochelle
the answer is 7
Answered by Steve
Ignore previous bogus posting.

There are 10 lines of symmetry.
There are 5 lines joining opposite vertices, and there are 5 lines joining the midpoints of opposite sides.
Answered by Gungun
I think the answer is 10
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