For A(1,2), B(4,6), C(-7,8), determine whether the angle at A is a right angle. | Class 10 Maths

Class 10 Maths — Coordinate geometry: identify a right angle without square roots

For A(1,2), B(4,6), C(-7,8), determine whether the angle at A is a right angle.

Compare squared side lengths to locate the right angle without estimating roots.

Try the problem yourself, then compare your working.

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