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3D Uncovered - TN29 September 2016

This activity uses technology to help students with the notoriously difficult idea of working with 2D planes within 3D situations and thus solve problems with trigonometry in 3 dimensions.Google sketchup... more

3D Uncovered29 September 2016

Use Google sketchup to see 2D planes in 3D shapes and make 3D trigonometry a little bit easier!This activity uses the 'Free' and 'Powerful' Google sketchup application to aid the visualisation of 3D geometry... more

Which Rule?free29 September 2016

'Master the art of working out when best to apply which rule to trigonometry problems'From SOHCAHTOA to cosine rule to Pythagoras's theorem, it can be difficult to know which is the most appropriate rule... more

Impossible Trianglesfree29 September 2016

Can these triangles exist?The main thrust of this activity is easily explained - What reasoning can you use to decide if these triangles can exist or not? To do the activity you need to assume that all... more

Sine Rule29 September 2016

'Derive the sine rule for yourselves'Take existing bits of knowledge and put them together to make new ones! That is a lovely model for mathematics and this activity gives a perfect opportunity to practise... more

Re-arranging relations29 September 2016

'Understand all the the things that are true about a given diagram, choose the right one and re-arrange it to suit you!'Once you know about SOHCAHTOA the next challenge is to find out how to apply to... more

Trig Calculator - TNfree29 September 2016

When students simply use a calculator, the meaning behind trig ratios is quickly lost. In order to build the ‘cabri – calculator’ students are challenged to really understand the origins of the... more

Trig Calculatorfree29 September 2016

'Make your very own trig ratio calculator!'When you input sin 30 on your calculator you should get 0.5Careful to make sure calculators are set to degrees and not radians.Have you ever wondered what your... more

Two Ways29 September 2016

'y = mx + c, ax +by + d = 0, what's the difference?'By this stage, we have spent a lot of time understanding how y= mx + c is a useful general form for linear equations because we can easily relate it... more

Parallel & Perpendicular29 September 2016

'How can we tell if two lines are at right angles to each other?'Can you draw two lines that are at right angles to each other without measuring the angle? What different ways are there of doing this?... more