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Question

Prove that the points A(0,0),B(0,2) and C(2,0) are the vertices of an equilateral triangle.

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Solution

Using distance formula,=(x2x1)2+(y2y1)2
AB=(00)2+(20)2=4=2 units
BC=(02)2+(00)2=4=2 units
CA=(00)2+(20)2=4=2 units
AB=BC=CA
Hence the given triangle form an equilateral triangle.

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