Find the measure of C for the circle :

x = 72

Step-by-step explanation:

∠DBC is an included angle and arc DB is its corresponding arc

Relationship between an included angle and its corresponding arc:  an included angle is equal to one half of its corresponding arc

so

∠DBC = arc DB

we are given that arc DB = 144

so we exchange arc db with 144

∠DBC =

so we can conclude that ∠DBC (x) = 72

m a t h w a y. c o m

step-by-step explanation: