In geometry, a parallelogram is a quadrilateralwith two sets of parallel sides.so naturally rhombus and rectangle are special case of parallelogram. That means every rhombus is parallelogram similarly every rectangle is a parallelogram. But converse need not be true.So parallelogram not necessarily a rhombus or a rectangle.GMG.
Rhombus. IV. Parallelogram. 5. If in a parallelogram its diagonals bisect each other at right angles and are equal, then it is a ... Every square is a rectangle. II ...
Rhombus. Riemann Sum. Riemannian Geometry. Right Angle. Right Circular Cone. Right Circular Cylinder. Right Cone: Right Cylinder. Right Prism. Right Pyramid. Right Regular Prism. Right Regular Pyramid. Right Square Parallelepiped. Right Square Prism. Right Triangle. RMS. Rolle's Theorem. Root Mean Square. Root of an Equation. Root of a Number ...
Remember that old saying from geometry class - "Every square is a rectangle, but not every rectangle is a square". Generalize that to: "Every square/parallelogram/rhombus is a polygon, but not every polygon is a square/parallelogram/rhombus". Here's what you're doing : String toBeCast = "cast this string" //this rhombus is a rhombus: cool!