f BC is tangent to circle O and OB is a radius, what kind of triangle is OBC?

(see pic) Point B on the pic is directalyy above O and C is to the
right of B
equilateral triangle

scalene triangle

right triangle

obtuse triangle

f BC is tangent to circle O and OB is a radius what kind of triangle is OBC see pic Point B on the pic is directalyy above O and C is to the right of B equilat class=