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sudut 1 = 3x
sudut 2 = 4x+5
sudut 3 = 3x+5
jumlh sudut segitiga = 180
mka :
180 = sudut (1+2+3)
180 = 3x + 4x+5 + 3x+5
180 = 10x+10
10x = 180-10
10x = 170
x = 170/10
x = 17
sudut 1 = 3 x 17 = 51⁰
sudut 2 = 4x+5 = 4x17 + 5 = 73⁰ (sudut terbesar A)
sudut 3 = 3x+5 = 3x17 + 5 = 56⁰
3x + (4x+5) + (3x+5) = 180°
10x + 10 = 180°
10x = 180 - 10
10x = 170
x =
Sudut terbesar = 4(17) + 5= 73 (a)