besar sudut BAD adalah

≡ penyelesaian :

⇒∠CBD :
= 180° - 120°
= 60°

⇒∠BAD :
= 180° - ( ∠CBD + ∠ADB )
= 180° - ( 60° + 50° )
= 180° - 110°
= 70°

[tex]~[/tex]

<BAD=180-(<ADB+<ADB)
=180-(50+(180-120))
=180-(50+60)
=180-110
=70°

⚛⚛⚛