Find the value of each variable. line / is a tangent

Check the picture below.

for "b", well, recall that the sum of all interior angles in a triangle is 180°.

for "a", "c" and "d", well, all those are just intercepted arcs.

step-by-step explanation: noo

c

c

c

c

c

c

c

cc

c

step-by-step explanation: