SOAL 1
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Cari Dulu Nilai x :
x + x + 20° = 90°
2x + 20° = 90°
2x = 90° - 20°
2x = 70°
x = 70° ÷ 2
x = 35°
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Besar CBD :
x + 20°
= 35° + 20°
= 55°
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Jawaban:
55°
Penjelasan dengan langkah-langkah:
[tex]90 = x + x + 20 [/tex]
[tex]90 - 20 = 2x[/tex]
[tex] \frac{70}{2} = x[/tex]
[tex]35 = x[/tex]
35+20:55
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