Tentukan besar sudut BAC!
bantu jawab ya kak,smga rejeki nya ngalir terus kayak rucika
bantu jawab ya kak,smga rejeki nya ngalir terus kayak rucika
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bangun datar
segitiga
jumlah sudut dalam segitiga = 180
Penjelasan dengan langkah-langkah:
ΔABC
<A= 2x + 4
<B = 8x + 1
<C = 4x + 7
jumlah sudut = 180
<A + <B + <C= 180
2x+4 + 8x + 1 + 4x+ 7 = 180
14x + 12 = 180
14x = 180 - 12
14x = 168
x = 168 : 14
x = 12
besar sudut BAC = <A
= 2x+ 4
= 2 (12) + 4
= 24 + 4
= 28