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octagon, trapezoid, pentagon...

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Not true.

A trapezium (or trapeziod) must have at least one acute angle.

Any regular polygon with 5 or more sides has all obtuse angles. However, an irregular polygon can always have one or more non-obtuse angles (acute, right or even reflex).

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Wiki User

12y ago

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Any polygon of more than four sides. e.g. pentagon etc.,

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lenpollock

Lvl 16
10mo ago
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Q: What polygon has interior angles that are all obtuse?
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