I REALLY must take issue with David Crawford when he states (Letters, June 24) that “geometry has little practical relevance”. He has got to be joking, surely?
Plane and solid geometry are the basis for just about every construction known to humankind, and the Global Positioning System (GPS) used by millions today is also based on simple but fundamental principles of geometry. The calculations to place anything at a certain position, elevation and orientation anywhere on land or sea will use geometry. A local example would be the new Queensferry Crossing – it wouldn’t do if the spans from either side did not meet up in the middle. So geometry is indeed of great practical relevance – algebra I’ll leave to others to commend.
Bill Stewart,
17 Benalder Street, Glasgow.
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