the adjacent sides of a parallelogram are 11cm and 15cm and length os the diagonal joining the end points of the two sides is 13cm . find the area of parallelogram

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

The longer leg of a 30-60-90 trangle is 18

A)a square brown tarp has a square green patch green in the corner the side length of the tarp is (x + 8) and the side length of the patch is x what is the area of the brown part of the tarpb)a square red placemat has a gold square in the corner the side length of the gold square is (x - 2) inches with the width of the red region is 4 in what is the area of the red part of the placemat