Jumlah besar sudut segitiga adalah 180° Jadi,
6 x + 15 = 180
6x = 180 - 15
6x = 165
x = 165 : 6
x = 27,5°
A = 2x
2x = 27,5° × 2 = 55°
maafin salah ngitung soalnya
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Jumlah besar sudut segitiga adalah 180° Jadi,
6 x + 15 = 180
6x = 180 - 15
6x = 165
x = 165 : 6
x = 27,5°
A = 2x
2x = 27,5° × 2 = 55°
maafin salah ngitung soalnya