Question

Jerome claims he can find the area of the composite shape shown by inscribing it in a rectangle and subtracting. Kelly claims that to find the area you need to use addition. Who is correct? Justify your answer.The picture looks like a 2 sided pointed pencil with 6 sides. The length of the whole 2 sided pencil is 21 cm. The left pointed area is triangle with 4cm pointed to a dividing line. The sides are 13 cm.It is 6cm between each 13 cm sides.

Answer 1

I'd say either can be true, but not all shapes can be inscribed in a rectangle. That is, so that all their vertices touch the sides of the rectangle.