Jawaban:
10
Penjelasan dengan langkah-langkah:
<BOC : <DOB - <DOC
x - 10 : 90 - 20 + 20
4x : 80
x : 20
> <BOC : x - 10
: 20 - 10
: 10
d. 20°
sudut siku siku = 90°
3x - 20° + x - 10° = 90°
3x + x - 20 - 10 = 90°
4x - 30° = 90°
4x = 90° + 30°
4x = 120°
x = [tex] \displaystyle\tt~ \frac{120}{4} [/tex]
x = 30°
< BOC = x - 10°
= 30° - 10°
= 20°
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Jawaban:
10
Penjelasan dengan langkah-langkah:
<BOC : <DOB - <DOC
x - 10 : 90 - 20 + 20
4x : 80
x : 20
> <BOC : x - 10
: 20 - 10
: 10
Verified answer
d. 20°
Penjelasan dengan langkah-langkah:
sudut siku siku = 90°
3x - 20° + x - 10° = 90°
3x + x - 20 - 10 = 90°
4x - 30° = 90°
4x = 90° + 30°
4x = 120°
x = [tex] \displaystyle\tt~ \frac{120}{4} [/tex]
x = 30°
< BOC = x - 10°
= 30° - 10°
= 20°