you can divide this picture into 2 pieces, 1 rectangle and 1 triangle.
To find the rectangle, since the opposite sides are equal to each other, the width=6.
the length is 8.
to find the area, use the formula
A = lw
A= 8 x 6
A = 48 units square
that's for rectangle.
for the triangle, use the formula
A = h x b / 2
height=10-6 = 4
base is 8 because the opposite sides are equal in rectangle.
Substitute height and base in the formula.
A= 4 x 8 / 2
A= 32/2
A=16 units square
That's the area of triangle.
Now, you can add the area of rectangle and triangle.
Total area = area of rectangle + area of triangle
A = 48 + 16
A = 64 units square