How it works
A family's facts belong to every shape inside it. Facts pass down the tree, never up.
Every rectangle is a parallelogram, so it has two pairs of parallel sides. Every square is a rectangle, a rhombus and a parallelogram.
A fact about parallelograms is true for rectangles and rhombuses too.
Worked examples
A fact passes down
- Every parallelogram has two pairs of parallel sides.
- A rhombus is a parallelogram.
- So a rhombus has two pairs of parallel sides.
Not up
- Every rectangle has four right angles.
- A parallelogram is not always a rectangle.
- So not every parallelogram has right angles.
Which family?
- A shape with four sides is a quadrilateral.
- A trapezoid, a rectangle and a rhombus are all quadrilaterals.
- Quadrilateral is the biggest family here.
A taste of the worksheet
These are the first problems of set A. The printable sheet has many more, with an answer key.
- Every rectangle has ___ right angles.
- Is every parallelogram a rectangle?
- Circle every shape that is a quadrilateral.