NO.
yes
A parellelogram has equal sides, the trapezoid is a parallelogram.
A square is always a parellelogram since it has equal sides.
not always
Yes.
A trapezium (most of the world) or a trapezoid (US).
No, a quadrilateral is not always a trapezoid.
No, not every trapezoid is an isosceles trapezoid.
A parallelogram is a quadrilateral (four-sided polygon) containing TWO pairs of parallel sides. A trapezoid is a quadrilateral with ONE pair of parallel sides. Therefore a trapezoid is NOT a parallelogram. Note: Both terms are misspelled in the question. The correct spellings are TRAPEZOID and PARALLELOGRAM.
No, there are many four sided shapes. The Square is one of them. Others include rectangle,trapezoid, parellelogram, and rhombus
Not always but sometimes
All the angles in a parallelogram can be equal, but are not always.