A=3 дм 4 см b=20см c= 4 дм S=?

To find the area (S) of the figure, we need to first convert all the measurements to the same units.

a = 3 dm 4 cm We know that 1 dm = 10 cm, so we can convert dm to cm: a = 3*10 cm + 4 cm = 34 cm

Now that all the measurements are in centimeters, we can proceed to find the area.

Since we do not have any information about the figure's shape, it is difficult to determine the exact formula to find the area. However, if we assume that the figure is a rectangle, the formula for the area of a rectangle is:

A = length * width

In this case, we have 2 measurements, a and b.

A = a * b = 34 cm * 20 cm = 680 cm^2

Therefore, the area (S) of the figure is 680 cm^2.