Inspiring to Inspire Maths


Expanding:2D Shape: Quadrilaterals 2 (Investigation)


angle, acute, obtuse, interior

opposite, adjacent, equal


polygon, perimeterdiagonal

quadrilateral, square, oblong

rectangle, rhombuskite


Hints and Tips


Your child has had the opportunity to investigate triangles.

Now he/she will be exploring quadrilaterals in more detail.

Remember that quadrilateral just means "four sides" so a quadrilateral has four-sides, it is 2-dimensional (a flat shape), closed (the lines join up), and has straight sides.

Essential Prior Knowledge

Recording systematically

Looking for patterns



This is a discussion and discovery activity about shapes and their properties.

Ask your child to either find pictures of, or draw quadrilaterals. He/she can either construct a chart or make a poster like ours.

 Things to think about:


·         Sides and their relationships e.g. length, parallel, perpendicular, opposite

·         Angle sizes e.g. obtuse, acute

·         Diagonals and how they meet


Encourage your child to draw each quadrilateral in a number of ways. Remember to draw or find both regular and irregular forms of each shape.