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### Number and algebra

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### Probability and statistics

### Working mathematically

### For younger learners

### Advanced mathematics

# Seeing Rhombuses

## You may also like

### Bracelets

### Cut and Make

### Is a Square a Rectangle?

Links to the University of Cambridge website
Links to the NRICH website Home page

Nurturing young mathematicians: teacher webinars

30 April (Primary), 1 May (Secondary)

30 April (Primary), 1 May (Secondary)

Or search by topic

Age 7 to 11

Challenge Level

*This game is part of a set of three. We recommend you play this version after having a go at Seeing Squares and Seeing Parallelograms.*

*Seeing Rhombuses printable sheet*

*Printable dotted grid*

This game can be played against a friend or against the computer.

Players take it in turns to click on a dot on the grid - the first player will place blue triangles and the second player will place pink squares.

The winner is the first to have chosen four dots that can be joined to form a rhombus.

Rhombuses can be anywhere and any size.

Clicking on the purple settings cog allows you to select the size of the grid, who the players are, and who goes first.

Once you've played a few times against a friend, you might like to discuss your strategies, and then test them by playing against the computer.

**Can you find a winning strategy?**

*If you are not using the interactive game, you may like to print off some dotty paper.*

*You may be interested in the other problems in our Strategy Games Feature.*

Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?

Cut a square of paper into three pieces as shown. Now,can you use the 3 pieces to make a large triangle, a parallelogram and the square again?

How many rectangles can you find in this shape? Which ones are differently sized and which are 'similar'?