Find the value of b.

b = 230 degrees a= 25 degrees

Step-by-step explanation:

d and e are right angles (90 degrees) because when tangent meets radius at circumference a right angle is formed.

c= 180 - 65 - 90 = 25 degrees because angles in a triangle add up to 180

both triangles are congruent as they share the middle line, they have tangents that meet radi(which are equal), and both have right angles.  this means that all angles are same in the triangles so a =c =25 and f=65.

65+65=130

360-130 = 230

because angles around a point add up to 360.

b=230

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation: