find the coordinates of the intersection of the diagonals of parallelogram PRYZ P(2,3) R(1,-2) Y(-5,-7) Z(-4,-2)
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$\displaystyle X_C=\frac{X_P+X_Y}{2}=\frac{X_R+X_Z}{2}$ $\displaystyle Y_C=\frac{Y_P+Y_Y}{2}=\frac{Y_R+Y_Z}{2}$
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