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4: If a point C lies between two points A and B such that AC = BC.
Then prove that AC = 1/2 AB, explain by drawing the figure.
Answer :

Line AB is drawn by joining A and B and a point C is taken between them such that AC covers the line segment AB in two overlaps.
AB = AC + BC
But, AC = BC,
Therefore, AB = 2AC
i.e., AC = 1/2 AB.