quadrangles means four-angled object but mostly a rectangular one
a trapezoid has 4 angles but only two sides are parallel
So a trapezoid can be a quadrangles but not all trapezoids are quadrangels
On another hand all quadrangles are trapezoid
there are 0 right angles in a trapazoid
No.
No.
no it is not
No, it is not.
a shape
Diagonals.
Yes.
No.
No.
Not normally
A half. ½