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No, only in a square (regular parallelogram).

The opposite angles are EQUAL in a parallelogram, and the adjacent angles are SUPPLEMENTARY

(they equal 180 degrees).

So if any angle in a parallelogram is a right angle, they all are. Otherwise, there are no right angles.

The angles of a parallelogram will average 90 degrees, as there are 360 degrees in any quadrilateral, (360/4 - 90) and 180 degrees in two adjacent non-equal angles (180/2 = 90).

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Q: Are all angles of a parallelogram equal to 90 degrees?

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It is a square, a regular parallelogram with all right angles. The reason is that in a parallelogram, the adjacent angles are supplementary (equal 180 degrees).In any case, the opposite angle would be 90 degrees as well, leaving just 180 degrees for the other two identical opposite angles.

A square.

No, not necessarily. A parallelogram can have all sides equal, but still not be a square.

Not necessarily. A parallelogram is a quadrilateral with 2 sets of 2 parallel sides. Only rectangles and squares have right angles as all four angles - a rectangle is a "special" parallelogram that has all four angles equal; a square is a "special" rectangle that has all four sides of equal length.

If all 4 sides are equal and the angles are not 90 degrees it is a rhombus.

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360 degrees

If you add the values of all four angles in a parallelogram together, the total will be 360 degrees.

Not unless all angles are also equal. A rhombus is a parallelogram with all sides equal. A rectangle is a parallelogram with all angles equal. A square is a rhombus with all angles equal which is a parallelogram with all sides equal and all angles equal.

The interior angles of all quadrilaterals sum to 360 degrees. Since a parallelogram is a quadrilateral, its interior angles must sum to 360 degrees.

A parallelogram has 2 equal opposite acute angles and 2 equal opposite obtuse angles whereas all 4 angles add up to 360 degrees.

No. A parallelogram has opposite sides parallel.A square is a parallelogram with all sides being equal and all internal angles being 90 degrees.A rectangle is a parallelogram with all internal angles being 90 degrees. and opposite side being equal in length.A rhombus is a parallelogram with all sides equal, but internal angles are not necessarily 90 degrees.

They can, but usually they are not. All the angles will be equal only if your parallelogram is a rectangle.

All 4 sided shapes each equal to 360 degrees in angles

A parallelogram has 2 opposite equal acute angles and 2 opposite equal obtuse angles that add up to 360 degrees and so the angles are 60, 60 120 and 120 degrees.

No. A rhombus is a parallelogram with all equal sides. A parallelogram with all equal angles is a rectangle (which might also be a rhombus and a square).

A parallelogram is a square when all 4 angles of the parallelogram are equal to 90 degrees and all 4 sides are congruent to each other

All the angles in a parallelogram can be equal, but are not always.

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