Equilateral Polygon is not necessarily Equiangular
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Theorem
Let $P$ be an equilateral polygon with more than $3$ sides.
Then it is not necessarily the case that $P$ is also equiangular.
Proof
We take as an example the rhombus:
A rhombus is a parallelogram whose sides are all the same length.
Its angles may or may not all be equal.
$\blacksquare$
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): polygon
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): polygon