Question

BAD=105° ,BA//AD,BC//DC
Find X​

Answer 1

Answer:

90°

explanation.

ba=ad so ang.abd=ang.adb

now in triangle bad.

ang.abd + ang.bda=180-105 =75

similarly in triangle bcd

ang.cbd + ang.cdb= 180 - 75.

so ang.cdb=105/2

adding ang.bcd and ang.adb=105/2+75/2=90