Sorry, but without the diagram that was given to you, you can't work out the area.
Try having a look here for more help:
bbc.co.uk/bitesize/guides/z2mtyrd/revision/2
To find the area of the shaded part in a rectangle, you first find the total area of the rectangle by multiplying its length by its width. Then, you subtract the area of the non-shaded part from the total area to get the area of the shaded part. The formula would be: Area of shaded part = Total area of rectangle - Area of non-shaded part
Depends on which part is shaded.
To calculate the total shaded area, first identify the shapes that comprise the shaded region and their dimensions. If the shaded area is part of a larger shape, subtract the area of the unshaded parts from the total area. Use appropriate area formulas for each shape involved, such as length times width for rectangles or πr² for circles. Sum the areas of all shaded portions to find the total shaded area.
You either need to find the area of the triangle and subtract it from that of the rectangle OR you find the areas of the bits of the rectangle that are outside the triangle and add them together. Without more details of the triangle, it is not possible to give a more detailed answer.
3 shaded blocks out of 10 is 3/10, or .3
What do you call shaded part?
Either directly or by finding the area of the whole and subtracting the area of the non-shaded part.
The answer depends on what part of the figure is shaded!
Area of rectangle with part of the shape missing = area of rectangle (lengthxwidth)-area of missing part.
Since there is no shaded part, the answer must be that its area is 0 square units.
The paint or the painted area
It is difficult to say since there is no image and it is not clear what part is shaded. But, if there is a circle with a 12 metre diameter which contains two equal circles which are as large as possible, then the shaded area is probably 56.55 square metres.