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Equilateral Triangle on a Given Line

Which of the ...

Question

Which of the following needs a proof?
(a) Theorem
(b) Axiom
(a) Definition
(d) Postulate

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Solution

Theorem needs a proof. Theorems are statements which are proved using definitions, axioms, previously proved statements and deductive reasoning.

Hence, the correct answer is option (a).

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Equilateral Triangle on a Given Line

Standard IX Mathematics