A quadrangle is a closed 2-dimensional shape bounded by four straight lines.
A quadrangle is a 4 sided shape.
If it is symmetric then it looks like an arrowhead.
A quadrangle is a shape with 4 angles, such as a square, rectangle, or paralellogram. A four sided shape is called a quadrilateral.
A quadrangle is any 4 sided shape and 360 degrees in a square.
It could look like an arrowhead (or delta).
A trapezoid
Right angles are congruent and so look the same wherever they are.
A rhombus for example
A rectangle with three irregular angles.
It does not because, by definition, it must have four sides: it cannot have two.
If a circle (equalling 360 degrees) is cut into four pieces, then rearranged a bit, it will become to look like one quadrangle or another. That is why a quadrangle, no matter HOW messed up, will still equal 360 degrees when its angles are added up.
a quadrangle is a 4 sided shape like a square or a rectangle a triangle isn't a quadrangle because it has 3 sides not 4