Classifying Quadrilaterals

Quadrilaterals

Three-sided shapes are all triangles (equilateral, isosceles or scalene).

Four-sided shapes are all quadrilaterals, and many have special names.

Task A: Naming quadrilaterals:

Write the proper name beside each diagram below.

Choose from: Arrowhead, Circle, Cube, Delta, Diamond, Hexagon, Kite, Oblong, Oval,

Parallelogram, Polygon, Prism, Pyramid, Rectangle, Rhombus, Square, Triangle, Trapezium.

Extension: Can you find the area of all the shapes above? Are there any useful rules?

Task B: Describing quadrilaterals:

We want to know about sides, angles & symmetry.

For each shape below, see how much you can say about it. One has been done for you.

Rhombus

 All sides equal

 Two pairs of parallel sides

 Opposite angles equal

 Two lines of symmetry

Your descriptions should be true for all shapes with this name, not just the example drawn.

Extension: Do any of these shapes have rotational symmetry? If so, what order?

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Parent category: Education