Yes they are equal in length
the sides that are parallel of each other are equal. * * * * * True, but that was not the question! In general, the diagonals are not of equal length.
Its diagonals are equal in length
An isosceles trapezoid will have diagonals of equal length but will never contain right angles by definition. A square and rectangle will have diagonals of equal length but will contain 4 right angles. A rhombus and any other parallelogram that does not contain right angles will not have diagonals of equal length.
They are of equal length.
No but the diagonals are equal in length
An isosceles trapezium.
The diagonals are equal in length and bisect each other forming vertical opposte equal angles