This study notes covers Common Mistakes within Properties of Quadrilaterals for GCSE Mathematics. Revise Properties of Quadrilaterals in Geometry & Measures for GCSE Mathematics with 11 exam-style questions and 3 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 7 of 10 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.
Common Mistakes
✗ Wrong: All parallelograms have 90° angles
✓ Right: Only rectangles and squares have 90° angles
✗ Wrong: Rhombus = tilted square (so has 90° angles)
✓ Right: Rhombus has equal sides but NOT necessarily 90° angles
✗ Wrong: Forgetting that a square IS a special rhombus, rectangle, and parallelogram
✓ Right: Shapes can belong to multiple categories!
Practice questions for Properties of Quadrilaterals
Which of the following is a property of a parallelogram?
State THREE properties of a rhombus, at least one of which relates to its diagonals.
Quick recall flashcards
Rhombus
All sides equal, opposite angles equal
Parallelogram
Opposite sides parallel and equal