The shape is formed by two polygons, a Isosceles Triangle and a Rectangle, so:
Isosceles Triangle Area:
Area Triangle = (base x height)/2
Base = 7 ; Height = 3
-> Atriangle = 7 x 3 / 2
-> Atriangle = 21/2
Rectangle Area:
Area Rectangle = Length x Width
Length = 7 ; Width = 3
-> Area Rectangle = 7 x 3 = 21
Area of the Shape (As) = Atriangle + Arectangle
-> As = 21/2 + 21
-> As = 21+42/2 = 63/2 = 31,5
Answer: The area of the shape is 31,5 or 63/2