# Perimeter, Area and Volume - Stage 3

These resources are designed to encourage you to explore perimeter, area and volume of shapes and solids based on rectangles and triangles. For resources about area, perimeter and volume that include shapes and solids with curved edges and surfaces, see our collection Perimeter, Area and Volume - Stage 4.

Scroll down to see the complete collection, or explore our subcollections on Perimeter and Area in two dimensions, and Surface Area and Volume in three dimensions.

### Perimeter and Area

This selection of problems is a great starting point for learning about Perimeter and Area.

### Surface Area and Volume

This selection of problems is a great starting point for learning about Surface Area and Volume

### Blue and White

##### KS 3 Challenge Level:

Identical squares of side one unit contain some circles shaded blue. In which of the four examples is the shaded area greatest?

### Pick's Theorem

##### KS 3 Challenge Level:

Polygons drawn on square dotty paper have dots on their perimeter (p) and often internal (i) ones as well. Find a relationship between p, i and the area of the polygons.

### An Unusual Shape

##### KS 3 Challenge Level:

Can you maximise the area available to a grazing goat?

### Painted Cube

##### KS 3 Challenge Level:

Imagine a large cube made from small red cubes being dropped into a pot of yellow paint. How many of the small cubes will have yellow paint on their faces?

### Cuboids

##### KS 3 Challenge Level:

Find a cuboid (with edges of integer values) that has a surface area of exactly 100 square units. Is there more than one? Can you find them all?

### On the Edge

##### KS 3 Challenge Level:

If you move the tiles around, can you make squares with different coloured edges?

### Sending a Parcel

##### KS 3 Challenge Level:

What is the greatest volume you can get for a rectangular (cuboid) parcel if the maximum combined length and girth are 2 metres?

### Fence It

##### KS 3 Challenge Level:

If you have only 40 metres of fencing available, what is the maximum area of land you can fence off?

### Efficient Cutting

##### KS 3 Challenge Level:

Use a single sheet of A4 paper and make a cylinder having the greatest possible volume. The cylinder must be closed off by a circle at each end.

### Isosceles Triangles

##### KS 3 Challenge Level:

Draw some isosceles triangles with an area of $9$cm$^2$ and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?

### Warmsnug Double Glazing

##### KS 3 Challenge Level:

How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?

### Cola Can

##### KS 3 Challenge Level:

An aluminium can contains 330 ml of cola. If the can's diameter is 6 cm what is the can's height?

### Can They Be Equal?

##### KS 3 Challenge Level:

Can you find rectangles where the value of the area is the same as the value of the perimeter?

### Cuboid Challenge

##### KS 3 Challenge Level:

What size square corners should be cut from a square piece of paper to make a box with the largest possible volume?

### Changing Areas, Changing Perimeters

##### KS 3 Challenge Level:

How can you change the area of a shape but keep its perimeter the same? How can you change the perimeter but keep the area the same?

### Changing Areas, Changing Volumes

##### KS 3 Challenge Level:

How can you change the surface area of a cuboid but keep its volume the same? How can you change the volume but keep the surface area the same?

### Perimeter Possibilities

##### KS 3 Challenge Level:

I'm thinking of a rectangle with an area of 24. What could its perimeter be?

### Triangles in a Square

##### KS 3 Challenge Level:

What are the possible areas of triangles drawn in a square?

### Perimeter Challenge

##### KS 3 Challenge Level:

Can you deduce the perimeters of the shapes from the information given?

### Colourful Cube

##### KS 3 Challenge Level:

A colourful cube is made from little red and yellow cubes. But can you work out how many of each?

### Isometric Areas

##### KS 3 Challenge Level:

We usually use squares to measure area, but what if we use triangles instead?

### More Isometric Areas

##### KS 3 Challenge Level:

Isometric Areas explored areas of parallelograms in triangular units. Here we explore areas of triangles...

### Perimeter, Area and Volume Stage 3 - Short Problems

##### KS 3

A collection of short Stage 3 problems on area and volume.