The perimeter is the length of all the sides, combined.
So, if you add all them up, the answer is 60cm.
In this problem, you will have to do some figuring, though.
To find the perimeter of the given figure, we need to divide them in easier figures.
Thus, we divide it into three rectangles as given in the figure .
If we consider whole as a rectangle , then opposite sides must be equal, thus, we get the remaining dimensions of the sides as shown in the figure.
Now, the perimeter of the figure =
Hence, the perimeter of the given figure = 60 cm
you would need to know all the numbers that are on there
arrange the equations with like terms in columns.
analyze the coefficients of x or y.
add the equations and solve for the remaining variable.
substitute the value into either equation and solve.
check the solution.
assume that all angles are right angles