Q4 of 84 Page 117

The diagonal of a square formed by the points (1, 0) (0, 1) (–1, 0) and (0, –1) is

Formula used:


Let the points be A (1, 0), B (0, 1), C (–1, 0) and D (0, –1)


Distance of diagonal AC


⇒ AC = √ ((–1 – 1)2 + ( 0 – 0)2)


⇒ AC = √ ((–2)2 + (0)2)


⇒ AC =√ (4 + 0)


⇒ AC = √ 4


⇒ AC = 2


∴ Option A is correct.

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