Iwill give you a brainlist if you get the right answer

You can notice that the shape can be divided into two parts: semi circle and rectangle
the total area=area of semi circle +area of rectangle
area of semi circle =

since the diameter =10 the radius must be 5
area of rectangle is width * height
therefore
area=

If one pair of adjacent sides of a parallelogram is congruent, then the parallelogram must be a rhombus