bantu jawab yaa,,beserta carany...

[tex]a = {35}^{0} \\ c = {180}^{0} - {115}^{0} = {65}^{0} \\ jadi \: besar \: sudut \: b \: = \\ {180}^{0} - {35}^{0} - {65}^{0} \\ {180}^{0} - {100}^{0} \\ = {80}^{0} [/tex]