Quadrilaterals

There are 65 NRICH Mathematical resources connected to Quadrilaterals
Seeing Parallelograms
problem
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Seeing parallelograms

Age
7 to 11
Challenge level
filled star empty star empty star

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

Rhombus It
problem
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Rhombus it

Age
11 to 16
Challenge level
filled star filled star empty star

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a rhombus.

Parallelogram It
problem
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Parallelogram it

Age
11 to 16
Challenge level
filled star empty star empty star

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a parallelogram.

Guess \my Quad
problem
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Guess my quad

Age
11 to 14
Challenge level
filled star empty star empty star

How many questions do you need to identify my quadrilateral?

Completing Quadrilaterals
problem
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Completing quadrilaterals

Age
11 to 14
Challenge level
filled star empty star empty star

We started drawing some quadrilaterals - can you complete them?

Quadrilaterals in a Square
problem
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Quadrilaterals in a square

Age
11 to 14
Challenge level
filled star filled star empty star
What's special about the area of quadrilaterals drawn in a square?
Shape Draw
problem
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Shape draw

Age
7 to 11
Challenge level
filled star empty star empty star

Use the information on these cards to draw the shape that is being described.

Poly Plug Rectangles
problem
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Poly plug rectangles

Age
5 to 11
Challenge level
filled star empty star empty star
The computer has made a rectangle and will tell you the number of spots it uses in total. Can you find out where the rectangle is?
Quadrilaterals game
game
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Quadrilaterals game

A game for 2 or more people, based on the traditional card game Rummy.
Quad in Quad
problem
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Quad in quad

Age
14 to 18
Challenge level
filled star filled star empty star
Join the midpoints of a quadrilateral to get a new quadrilateral. What is special about it?