circle geo (1 Viewer)

[Chicken Burger]

Hi need help with this, i can get beta but not alpha

 

[Chicken Burger]

sorry click this one, less strain for the neck lol

 

[Chicken Burger]

bump

 

[Chicken Burger]

anyone? carrotsticks?

 

[Demento1]

Think: (assuming O is centre)

Angle subtended at circumference is half angle subtended at the centre by the same arc for beta.

Isosceles triangles in triangle OAB and solve for alpha.

 

[Chicken Burger]

oh you are right it is an isosceles, can't believe i didnt see that
thanks demento, all the info i need