Tolong menggunakan caranya ya

a. besar KGJ
KGJ = ADJ
180-144 = 36
b. besar JGI
JGI = IGK - KGJ
JGI = (180-58) - (36)
JGI = 122 - 36
JGI = 86

CBF = 180 - ABC = 122
CBF = ABI = KGI = 122
ABC = IBF = IGH = 58
ADE = JDF = JGH = 144
KGJ = 180 - JGH = 36
JGI = KGI - KGJ = 122 - 36 = 86