Identify all of the central angles of circle O. A.)ZAOB, ZBOC, ZAOC
B.)ZAOB, ZBOC, ZOBC
C.)ZAOB, ZBOC, ZOBC, ZAOC
D.)ZAOB, ZBOC

In this problem it decreased 20%

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

the value of x is equal to 0.

1. statement- ca is parallel to db and e is the midpoint of ad reason- given2. statement- reason- alternate interior angles3. statement- de is congruent to ae reason- definition of midpoint4. statement- triangle aec is congruent to triangle deb reason- asa (angle side angle)