Number 1
Area of square = Length x Length = 9.3cm x 9.3cm = 86.49cm^2
Number 2
Area of triangle = 1/2 x base x height
=1/2 x 14 in x 7in = 49 in^2
Number 3
Area of Rectangle = Length x Breadth

Number 4
Area of triangle = 1/2 x base x height
=1/2 x 6.4m x 3.8m= 12.16m^2