enneagons or nonagons
4 sides
A quadrilateral has 4 sides.
If all the sides are different lengths, it can only be called a quadrilateral. In general, four sided two dimensional objects are called quadrilaterals. When all four sides are the same length it is a square if all four corners are right angles. Otherwise it is a rhombus. If the opposite sides are the same length, it is a rectangle if the four corners are right angles, otherwise it is a parallelogram. In all these cases, the opposite sides are parallel to each other. There is also the trapezoid, a quadrilateral with only one pair of parallel sides. If the opposite sides are the same length but not parallel. it is an isosceles trapezoid.
4 sides and 4 vertices
Yes.
octagons
enneagons or nonagons
perimeter
4 sides
Spherical objects do not have 'sides'.
A QUADRANGLE HAS 4 SIDES QUADRANGLE- QUAD MEANS 4
A Square has 4 sides
Yes! 4 sides :)
A quadrilateral has 4 sides.
A kite is a 4 sided quadrilateral that has no parallel sides.
It is not clear what you mean by "has 4 right sides opposite sides equal". If you delete the phrase "4 right sides", the answer is a rhombus.