+36915 First add all of the givens 20 + 12 + 3.1 +3.1 +3.1 = 41.3 cm
now you need to find the length of the slanted side...using pythag theorem
height (one leg ) = 3.1 + 3.1 = 6.2 cm
Othe leg is 20 - (12+3.1) = 4.9
Find the slanted side length using Pythag Theor
L^2 = 6.2^2 + 4.9^2 L = ......... cm <---------- add this to the 41.3 cm we found above for the total circ in cm
