Ok so as we can see, one shape is a circle and the other is a rhombus The formula for a circle is Pi times radius squared So, we do Pi times eight squared which is 201 mm squared Now, for the rhombus, we do side times side So, we do ,48*24 which is 1152mm squared BUT we only want the area of the shaded figure, so we minus 1152 by 201 which gives us 951mm squared. Hope this helps :)