- Aequal to one another
- Bequal to 100°
- Cdifferent in different figures
- Dgreater than a straight angle
Step-by-Step Solution
Euclid's fourth postulate states that all right angles are equal to one another.
Answer: A) equal to one another
According to Euclid, all right angles are:
Class 9Euclid's AxiomsGeometry — Foundations
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