There are **55** NRICH Mathematical resources connected to **Length/distance**, you may find related items under Measuring and calculating with units.

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Try some throwing activities and see whether you can throw something as far as the Olympic hammer or discus throwers.

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Look at the changes in results on some of the athletics track events at the Olympic Games in 1908 and 1948. Compare the results for 2012.

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Look at some of the results from the Olympic Games in the past. How do you compare if you try some similar activities?

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A group of children are discussing the height of a tall tree. How would you go about finding out its height?

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Can you place these quantities in order from smallest to largest?

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These pictures were made by starting with a square, finding the half-way point on each side and joining those points up. You could investigate your own starting shape.

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Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?

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My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.

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Can you put these shapes in order of size? Start with the smallest.

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Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its vertical and horizontal movement at each stage.

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Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the red dot affects the distance it travels at each stage.

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A circle rolls around the outside edge of a square so that its circumference always touches the edge of the square. Can you describe the locus of the centre of the circle?

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How far have these students walked by the time the teacher's car reaches them after their bus broke down?

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During the third hour after midnight the hands on a clock point in the same direction (so one hand is over the top of the other). At what time, to the nearest second, does this happen?

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Measure problems at primary level that may require resilience.

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Measure problems at primary level that require careful consideration.

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Measure problems for primary learners to work on with others.

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Measure problems for inquiring primary learners.

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You will need a long strip of paper for this task. Cut it into different lengths. How could you find out how long each piece is?

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These Olympic quantities have been jumbled up! Can you put them back together again?

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Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?

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In which Olympic event does a human travel fastest? Decide which events to include in your Alternative Record Book.

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Have you ever wondered what it would be like to race against Usain Bolt?

This article for teachers suggests ideas for activities built around 10 and 2010.

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I cut this square into two different shapes. What can you say about the relationship between them?

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Four vehicles travel along a road one afternoon. Can you make sense of the graphs showing their motion?

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Can you choose your units so that a cube has the same numerical value for it volume, surface area and total edge length?

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From the information you are asked to work out where the picture was taken. Is there too much information? How accurate can your answer be?

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Investigate the different distances of these car journeys and find out how long they take.

This article for teachers suggests ways in which dinosaurs can be a great context for discussing measurement.

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Swimmers in opposite directions cross at 20m and at 30m from each end of a swimming pool. How long is the pool ?

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What do these two triangles have in common? How are they related?

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The Earth is further from the Sun than Venus, but how much further? Twice as far? Ten times?

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Use simple trigonometry to calculate the distance along the flight path from London to Sydney.

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Use the interactivity to move Pat. Can you reproduce the graphs and tell their story?

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Chippy the Robot goes on journeys. How far and in what direction must he travel to get back to his base?

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Can you prove that the sum of the distances of any point inside a square from its sides is always equal (half the perimeter)? Can you prove it to be true for a rectangle or a hexagon?

This article, written for students, looks at how some measuring units and devices were developed.

Mathematics has allowed us now to measure lots of things about eclipses and so calculate exactly when they will happen, where they can be seen from, and what they will look like.

A paradox is a statement that seems to be both untrue and true at the same time. This article looks at a few examples and challenges you to investigate them for yourself.

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N people visit their friends staying N kilometres along the coast. Some walk along the cliff path at N km an hour, the rest go by car. How long is the road?

What is the shortest distance through the middle of a dodecahedron between the centres of two opposite faces?

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A game for two or more players that uses a knowledge of measuring tools. Spin the spinner and identify which jobs can be done with the measuring tool shown.

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Alice's mum needs to go to each child's house just once and then back home again. How many different routes are there? Use the information to find out how long each road is on the route she took.

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In this version of the story of the hare and the tortoise, the race is 10 kilometres long. Can you work out how long the hare sleeps for using the information given?

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Follow the journey taken by this bird and let us know for how long and in what direction it must fly to return to its starting point.

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Use this information to work out whether the front or back wheel of this bicycle gets more wear and tear.

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Nirmala and Riki live 9 kilometres away from the nearest market. They both want to arrive at the market at exactly noon. What time should each of them start riding their bikes?

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Chandrika was practising a long distance run. Can you work out how long the race was from the information?