Stage: 4 Challenge Level: 
If I print this page which shape will require more yellow ink?
Estimate first making a note of your decision and how you made it.
How has this shape been created?
How would you get a reliable calculation for the area that needs yellow ink?
Create shapes of your own that look good.
Challenge yourself to calculate their areas.
Arcs, sectors and segments. Area. Pythagoras' theorem. Index notation/Indices. Long problems. Interactivities. Quadratic equations. Scale factors. Circle theorems. Dynamic geometry.
Published July 2006,August 2006.
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