Angle Estimates

Estimate the size of these angles then add your estimates together.

Protractor

Teacher: There's a protractor you can drag over the angles to measure them. Hold down the shift key while dragging to rotate the protractor. The previous Flash version of this activity is here. This may be useful if you have an older web browser that does not support rotating the protractor.


Topics: Starter | Angles | Estimating | Geometry

  • L Smith, Colwyn Bay
  • Monday, May 22, 2006
  • "An absolutely brilliant resource. Only recently been discovered but is used daily with all my classes. It is particularly useful when things can be saved for further use. Thank you!"
  • Transum,
  • Wednesday, May 28, 2014
  • "It has always been tricky to demonstrate the use of a protractor to a class until overhead projectors came along. Does anyone still have those over sized wooden protractors designed to be used with the blackboards? They were difficult to handle and, not being transparent, were useless for angles with smaller arms. This starter provides a visual aid making it easier to show the finer points of protractor use."
  • Richard Field, A School
  • Monday, August 4, 2014
  • "I have tried torch and chrome and the protractor doesnt rotate.

    [Transum: Try holding down the 'shift' key as you drag the protractor to rotate it. If it still doesn't work in your versions of the browsers try the Flash version instead. The link is under the main panel above. Feedback if still no joy!]"

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
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This starter has scored a mean of 2.9 out of 5 based on 160 votes.


Previous Day | This starter is for 28 May | Next Day

 

Answers

Allow five degrees either side of the correct answer!

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.


Laptops In Lessons

Teacher, do your students have access to computers?
Do they have Laptops in Lessons or iPads?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here is the URL for a concise version of this page without comments or answers.

Transum.org/go/?Start=May28

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=estang

 

 




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