tolong bantu........
B. 47°
Penjelasan dengan langkah-langkah :
› Nilai x
(2x + 15)° + (3x + 25) + 60° = 180°
2x + 3x + 15 + 25 + 60 = 180°
5x + 35 + 60 = 180°
5x + 100 = 180°
5x = 180° - 100
5x = 80
x = ⁸⁰⁄₅
x = 16
› Besar ∠ABE
∠ABE = (2x + 15)°
= (2(16) + 15)°
= (32 + 15)°
= 47°
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