perhatikan gambar dibawah
- Nilai x
→ 5x + 3x = 180°
→ 8x = 180°
→ x = 22,5°
- Besar sudut ACD
→ 5x
→ 5(22,5°)
→ 112,5°
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Jawaban:
cari dulu besar x
sudut ACD + sudut BCD = 180° (sudut berpelurus)
5x + 3x = 180°
8x = 180°
x = 180/8
x = 22,5°
besar sudut ACD = 5x = 5 . 22,5 = 112,5°
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