Question

plisss kaa tolong jawab.. bentar lagi di kumpulin ​

Answer 1

Materi : Garis dan Sudut

Nilai x

x - 10 + 3x - 20 = 90°

4x - 30° = 90°

4x = 120°

x = 30°

Kesimpulan

∠BOC = x - 10 = 20°

Semoga bisa membantu

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Answer 2

Penyelesaian

_________________________________

~ Matematika

∠ DOB = Siku-siku

∠ DOC + ∠ COB = 90°

3x - 20 + x - 10 = 90°

4x - 30 = 90°

4x = 90 + 30

x [tex] \rm = \frac{120}{4} [/tex]

x = 30

∠ BOC = x - 10

∠ BOC = 30 - 10

∠ BOC = 20°

Opsi : 20° (D)

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