Primary National Strategy - Interactive Teaching Programs


Calculating angles
Counting on and back
Data handling
Decimal number line
Division Grid
Fixing points
Isometric grid
Line graph
Measuring cylinder
Measuring scales
Moving digits
Multiplication facts
Multiplication grid
Number dials
Number facts
Number grid
Number line
Number spinners
Ordering numbers
Place value
Remainders after division
Tell the time
Twenty cards

Calculating angles

This ITP allows you to place shapes around a point and investigate their angles. You can opt to display the shapes in one, two or four quadrants. The first shape is placed on the screen in the first quadrant with one of its sides horizontal.

Run this ITPRun Calculating angles 0.8
Calculating angles

Additional shapes are rotated around the central point to fit against the previous shape. In some shapes side lengths and angles are generated randomly. Shapes generated can be dragged to new positions and overlaid to form new intersecting shapes and angles.

shape buttonSelect the type of shape to place on the screen.

If you click ‘copy’ you create a shape with the same base angle as the previous shape.

colour buttonSelect the colour of the next shape

quadrant buttonOpt to show one, two or four quadrants.

Two quadrants (180º) are shown in the example above.

protractor buttonShow or hide the protractor. You can drag the protractor around the screen and rotate it using the rotate handle on its right-hand side.

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