B What is the value of x in trapezoid ABCD?
O x=15
(3x)
O x=20
O x=45
с
O x=60
(9x)
D
А

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

b