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Of four points are collinear, they are also coplanar

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x