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Question -

In ∆ABC, the coordinates of vertex A are (0, -1) and D (1, 0) and E (0, 1) respectively the mid-points of the sides AB and AC. If F is the mid-point of side C, find the area of ∆DEF. [CBSE 2016]



Answer -

Let B (p, q), C (r, s) and F (x, y)
Mid-point of AB = Coordinates of D

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