3 6 7
sides of the parallelogr
17. Find the value of x if:
b. 6, 15, 8, x are in pro
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We know that the diagonals of a parallelogram bisect each other. So, coordinates of the mid-point of diagonal AC are same as the coordinates of the mid-point of diagonal BD.
∴(26+9,21+4)=(28+p,22+3)
⇒(215,25)=(28+p,25)
⇒215=28+p⇒15=8+p⇒p=7
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