tolongg ya kakkk matematika
Diketahui
Garis lurus memiliki sudut 180°
Sudut siku" = 90°
6y = 180 - 90
6y = 90
y = 15°
∠ABD = 4y
∠ABD = 4(15)
∠ABD = 60°
∠EBC = 2y
∠EBC = 2(15)
∠EBC = 30°
Jawaban:
60°
Penjelasan dengan langkah-langkah:
diektahui
- ABC = 180°
- ABD = 4y
- DBE = 90°
- CBE = 2y
ABC = ABD + DBE + CBE
180° = 4y + 90° + 2y
180° - 90° = 4y + 2y
90° = 6y
y = 90/6
ABD = 4y
ABD = 4 x 90/6
ABD = 360/6
ABD = 60
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