- ATriangle
- BRight angle
- CPoint
- DCircle
Step-by-Step Solution
In a modern axiomatic treatment, point, line and plane are taken as undefined (primitive) terms. Triangle, circle, right angle are all defined.
Answer: C) Point
Which is correctly described as an 'undefined term' in Euclidean geometry?
Class 9Euclid's PostulatesGeometry — Foundations
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