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Question
Find the distances between the following point.
A(a, 0), B(0, a)
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Solution
A(a, 0), B(0, a)
\[AB = \sqrt{\left( 0 - a \right)^2 + \left( a - 0 \right)^2}\]
\[ = \sqrt{a^2 + a^2}\]
\[ = \sqrt{2 a^2}\]
\[ = a\sqrt{2}\]
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