Parallelogram - Math Steps, Examples, Properties & Questions
Lines of Symmetry in Parallelograms (Square, Rectangle and Rhombus)
Are there lines of symmetry in a parallelogram? - Quora
Quadrilateral - Definition, Properties, Types, Area, Perimeter, Examples GeeksforGeeks
Properties of Rhombuses, Rectangles, and Squares - dummies
The number of lines of symmetry in a rectangle and a rhombus are ------- (equal /unequal)
Classifying Parallelograms
Properties of Quadrilaterals - square, rectangle, rhombus, parallelogram, kite, trapezoid - HubPages
Observe Quadrilateral Properties through Symmetry - MathBitsNotebook(Geo)