Quadrilaterals.
Four sided figures are called quadrilaterals. They are usually squares, rectangles, trapizoids, etc..
4 sided figures are quadrilaterals some of which are a square, a rectangle, a rhombus, a parallelogram, a kite ... etc
yes
There are none to be seen but if you meant 4 sided figures then they are quadrilaterals
Quad- or tetra-
4
Yes quadrilaterals are 4 sided closed figures or polygons
No but it is a 4 sided quadrilateral
A parrolulegram is all 4 sided figures, and trapizoid is not a 4 sided figure?
a 4 sided shape is called a quadrilateral
There exists at least one quadrilateral which is not 4-sided.
A square and a rectangle are 4 sided figures each having 4 interior 90 degree angles