Area of the above shapes can be calculated in two steps
i) Area of shape marked 1
ii) Area of shape marked 2
⇒ Area of shape marked 1 = Area of rectangle
= length × breadth
= 4 × 9
= 36 cm2
⇒Area of shape marked 2 = Area of triangle
= 12× base × height
= 12× 6 × 4
= 12 cm2
⇒Area of shape = Area of shape marked 1+ Area of shape marked 2
= (36 + 12) cm2
= 48 cm2