Question

in the adjoining figure ab parallel to cd. the value of x which will make ef parallel to cd is​

Answer 1

Step-by-step explanation:

by alternative angles

75=30+angleECD

45=angleECD

extend the line EF is straight line

45+x=180(45 degrees come alternative angles when you extend the line EF)

x=135

Answer 2

Answer:

135

as 75-30 =45

so, 180 - 45 =135

=> x = 135