Curriculum
Mathematics — First Preparatory
Unit 1: Numbers
0/10
Unit 2: Algebra
0/4
Unit 3: Statistics
0/6
Text lesson
Quadrilaterals
Quadrilaterals
Common mistakes
Common mistakes
- Calling every rectangle a rhombus, or the other way round. Adjacent sides of a rectangle are usually not equal.
- Believing that the diagonals of every parallelogram are equal. This is a property of the rectangle only.
- Forgetting that neighbouring angles of a parallelogram are supplementary.
- Confusing a trapezium with a parallelogram. A trapezium has only one pair of parallel sides.
Quadrilaterals · 4 / 5