Tolong dijawab plis soal A dan B nya

[tex]a) nilai \: a\\ 180 = 68 + a + a \\ 180 - 68 = 2a \\ 112 = 2a \\ \frac{112}{2} = a \\ a = 56 \\ nilai \: b \\ 180 = (5b + 12) + 2b \\ 180 = 5b + 12 + 2b \\ 180 = 7b + 12 \\ 180 - 12 = 7b \\ \frac{168}{7} = b \\ b= 24 \\ b)besar < deg \: dan \: < kln \\ < deg = 68 + a = 68 + 56 = 124 \\ < kln = 5b + 12 = (5 \times 24) + 12 = 120 + 12 = 132[/tex]