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Sudut C

C + 110° = 180°

C = 180 – 110

C = 70°

c + x + x + 10° = 180°

70° + 10° + 2x = 180°

2x = 180 – 80

2x = 100°

x = 100/2

x = 50°

BDC =

x + 10° =

50° + 10° =

60°

Jawaban:

CBD = x = 50⁰

BDC = x + 10 = 50 + 10 = 60⁰

Penjelasan dengan langkah-langkah:

BCD = 70⁰ (krn pelurus)

jml sudut dlm segitiga BCD hrs = 180⁰

shg kl BCD = 70⁰ maka :

jumlah sudut B + D = 110⁰

x + ( x + 10 ) = 110⁰

2x = 110 – 10 = 100

x = 50⁰