Explanation:
in this figure you can observe 1 cube and 3 half cirles
the flield of the square would by using a formula a(lenght) * b(height)
in this case it would be 10m * 10m = 100m
and the formula for a cirle would be
A = pir^2
knowing that we can connect two of the halfs and make a cirle with a radius of 5
A= pi 5^2
A= pi 25
25pi approximatly equals to 78.53982m
knowing that information we can devide that value by 2 and get the value of the 3rd half cirlce
which is 39.26991m
than we add all the values we collected
39.26991m + 78.53982m + 100m = 217.80973 m