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80° + 80° + 120°= 280°
360° _ 280° =80°
180°_80°=100°
اذن x=100°
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180-100=80
180-60≈120
180-100=80
360_(80+120+80)=80
180-80=100=X
360درجه للشكل الرباعي وX مكمله لزاويه مستقيمه من زوايا الشكل الرباعي
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1
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46
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8X+20=180
8X=160
X=20
Y=3X +6=66
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From the provided information
ꕔ ABC is an isosceles ꕔ
∠ABC = ∠ACB = (3𝑥 + 6) = 𝑦
Now (2𝑥 + 8} + 2(3𝑥 + 6) = 180°
2𝑥 + 8 + 6𝑥 + 12 = 180°
8𝑥 + 20 = 180°
8𝑥 = 160°
𝑥 = 20°
(3𝑥 + 6) = 𝑦
(3*20 + 6) = 𝑦
∴ 𝑦 = 66°
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