No, a quadrilateral is not always a trapezoid.
No, not every trapezoid is an isosceles trapezoid.
Not always but sometimes
Yes a trapezoid is always a 4 sided quadrilateral.
A trapezoid will always be a quadrilateral because it has 4 sides
No, a trapezoid is not always a rhombus, but they are both four-sided quadrilaterals.
Yes, because it has 4 sides.
A trapezoid is always a 4 sided quadrilateral
Yes.
A trapezoid will always have I pair of opposite parallel sides of different lengths.
If you want to, you can always draw a circle around an isosceles trapezoid and the radius can be half the base of the trapezoid.
No. In fact, a trapezoid is never a parallelogram.
Only when it is an isosceles trapezoid.