Q: Do all parallelograms squares and trapezoids have 4 angles?

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No because all quadrilaterals are 4 sided shapes which includes parallelograms, trapezoids, squares, rectangles, kites......etc

No shape is a square but not a parallelogram as all squares are parallelograms: All parallelograms have opposite sides parallel and of equal length, and opposite angles are equal. All squares have opposite sides that are parallel and of equal length, and opposite angles are equal; thus all squares are parallelograms. However, all squares also have all angles equal to 90o and all four sides equal, but some parallelograms have angles not all 90o and/or not all four sides of equal length; thus not all parallelograms are squares.

They are all 4 sided quadrilaterals whose 4 interior angles add up to 360 degrees

All triangles and regular polygons such as squares, parallelograms, trapezoids, and rectangles are convex because each of their interior angles is less than 180o.

The inside angles total 180 degrees, and the outside angles total 360 degrees. It is the same for triangles, parallelograms, rectangles, squares, trapezoids, hexagons, heptagons, octagons, and all enclosed plane figures.

Related questions

All quadrilaterals have four angles including: squares rectangles rhombus trapezoids parallelograms

No trapezoids are parallelograms, and no parallelograms are trapezoids.

No trapezoids are parallelograms, and no parallelograms are trapezoids.

No trapezoids are parallelograms, and no parallelograms are trapezoids.

No because all quadrilaterals are 4 sided shapes which includes parallelograms, trapezoids, squares, rectangles, kites......etc

No trapezoids are parallelograms, and no parallelograms are trapezoids.

No. Parallelograms are never trapezoids. Trapezoids are never parallelograms.

No shape is a square but not a parallelogram as all squares are parallelograms: All parallelograms have opposite sides parallel and of equal length, and opposite angles are equal. All squares have opposite sides that are parallel and of equal length, and opposite angles are equal; thus all squares are parallelograms. However, all squares also have all angles equal to 90o and all four sides equal, but some parallelograms have angles not all 90o and/or not all four sides of equal length; thus not all parallelograms are squares.

Squares

They are all 4 sided quadrilaterals whose 4 interior angles add up to 360 degrees

All triangles and regular polygons such as squares, parallelograms, trapezoids, and rectangles are convex because each of their interior angles is less than 180o.

The inside angles total 180 degrees, and the outside angles total 360 degrees. It is the same for triangles, parallelograms, rectangles, squares, trapezoids, hexagons, heptagons, octagons, and all enclosed plane figures.