Inside a rectangle abcd with ab = 10 cm and bc = 5cm constructed a square and a triangle abmn ecb rectangle with equal sides. find the perimeter of the new figures

just sum

10 + 10 = 20

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this