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answer is 48
here we will easily find y=21
and by the help of parallel line rule we also find out x=69
then x-y=69-21=48..
rohan2608:
can you explain me clearly how do you get the value of y
As angle ABM =42o AngleADMis also 42o (AB=AD)
Angle ADM=42 then ,angle ADG=(180-42)= 138
In triangle ADG,
HERE AD=GD
So,GAD=GDA
Sum of all angles of a triangle=
angle GAD+angleADG+angleGDA=180
2y+138=180
Y=21....
HOPE U WILL UNDERSTAND....................
Angle ADM=42 then ,angle ADG=(180-42)= 138
In triangle ADG,
HERE AD=GD
So,GAD=GDA
Sum of all angles of a triangle=
angle GAD+angleADG+angleGDA=180
2y+138=180
Y=21....
HOPE U WILL UNDERSTAND....................
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