A circle is one example of a plane figure that is not a polygon.
A V is also not a polygon.
Chat with our AI personalities
The 11 side polygon is called bysocleptron
A parallelogram is a quadrilateral (four-sided polygon) with two pairs of parallel sides. By definition, a parallelogram does not need to have all right angles. Think of rhombuses, which do not have any right angles, yet are parallelograms. Therefore, the answer is no.
eyes
Well, that poor geometry teacher probably kept muttering, "Polly-gon, where art thou?" But let's be real, that parrot probably flew the coop because it got tired of hearing about angles and shapes all day. Time for that teacher to find a new feathered friend who appreciates a good math pun.
Any type of triangle will have angles that add up to 180o. yet two angles of an isosceles triangle are equal