The measure of the missing sides are
GJ = 60 units
MH = 34.01
IK = 25.06
HI = 50.1
MG = 34.01
How to find the missing side
GI is sought knowing that GL = GI = 30
Therefore
GJ = 30 + 30 = 60 units
MH is solved using Pythagoras theorem as follows
MH = √(14² + 31²)
MH = √(196 + 961)
MH = √(1157)
MH = 34.01
IK = KH which is solved using Pythagoras theorem as follows
IK = √(34.01² - 23²)
IK = √(34.01² - 23²)
IK = √(1157 - 529) = 25.06
IK = 25.06
HI = HK + IK
HI = 25.06 + 25.06
HI = 50.1
MG = MH = 34.01 (circumcenter)