If the shape above is enlarged with a scale factor of 2 click on the points that
could be the centre of enlargement if the image does not reach outside the grid.
Your Image has broken out of the grid !!!
Try again with the same shape Try again with a different shape


Transum.orgThis web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available. Please contact me if you have any suggestions or questions. 
More Activities: 

Mathematicians are not the people who find Maths easy; they are the people who enjoy how mystifying, puzzling and hard it is. Are you a mathematician? Comment recorded on the 10 April 'Starter of the Day' page by Mike Sendrove, Salt Grammar School, UK.: "A really useful set of resources  thanks. Is the collection available on CD? Are solutions available?" Comment recorded on the 1 May 'Starter of the Day' page by Phil Anthony, Head of Maths, Stourport High School: "What a brilliant website. We have just started to use the 'starteroftheday' in our yr9 lessons to try them out before we change from a high school to a secondary school in September. This is one of the best resources online we have found. The kids and staff love it. Well done an thank you very much for making my maths lessons more interesting and fun." 
Each month a newsletter is published containing details of the new additions to the Transum website and a new puzzle of the month. The newsletter is then duplicated as a podcast which is available on the major delivery networks. You can listen to the podcast while you are commuting, exercising or relaxing. Transum breaking news is available on Twitter @Transum and if that's not enough there is also a Transum Facebook page. 

Numeracy"Numeracy is a proficiency which is developed mainly in Mathematics but also in other subjects. It is more than an ability to do basic arithmetic. It involves developing confidence and competence with numbers and measures. It requires understanding of the number system, a repertoire of mathematical techniques, and an inclination and ability to solve quantitative or spatial problems in a range of contexts. Numeracy also demands understanding of the ways in which data are gathered by counting and measuring, and presented in graphs, diagrams, charts and tables." Secondary National Strategy, Mathematics at key stage 3 

Go MathsLearning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths main page links to more activities designed for students in upper Secondary/High school.  
Teachers  
If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows: 
Alternatively, if you use Google Classroom, all you have to do is click on the green icon below in order to add this activity to one of your classes. 
It may be worth remembering that if Transum.org should go offline for whatever reason, there are mirror site at Transum.info that contains most of the resources that are available here on Transum.org. When planning to use technology in your lesson always have a plan B! 
Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments. 
© Transum Mathematics 19972024
Scan the QR code below to visit the online version of this activity.
https://www.Transum.org/go/?Num=913
Click on all the points that could be the centre of enlargement of the shape if the image does not go off the grid.
Close
❎Level 1  Enlargement scale factor 2
Level 2  Enlargement scale factor 3
Level 3  Enlargement scale factor 1
Level 4  Enlargement scale factor 2 without image drawing
Level 5  Enlargement scale factor 3 without image drawing
Level 6  Enlargement scale factor 1 without image drawing
More on Enlargements including lesson Starters, visual aids, investigations and selfmarking exercises.
The phrase Blow Up has two meanings. It could me to enlarge as in â€śplease blow up this photograph to A3 sizeâ€ť but it could also mean to explode. Both meanings are used in this challenge.
In Mathematics, when a shape (object) is enlarged, the position of the enlargement (image) is determined by the position of the centre of enlargement. Think of a torch (flashlight) being held at the centre of enlargement shining on the shape and casting a shadow behind it. The position of the shadow will change as the torch moves.
The objective of this challenge is to find all the dots on the grid which could possibly be the centre of enlargement if the image can be drawn completely on the grid. You will see and hear an explosion if the image created breaks out of the grid.
It is recommended the simpler Enlargements exercise (part of the Transformations exercise) is completed before taking on this challenge.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you donâ€™t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
This activity was inspired by Dr Colin Foster, Reader in Mathematics Education in the Mathematics Education Centre at Loughborough University
Before attempting this challenge you should already be good at drawing enlargements (part of the Transformations exercise). Below is an excerpt from the help video created for the Transformations exercise.
Answers to this exercise are available lower down this page when you are logged in to your Transum account. If you donâ€™t yet have a Transum subscription one can be very quickly set up if you are a teacher, tutor or parent.
Close
❎