In this problem we know that
m>EDG=<1+<2=70
so
<1+<2=70 -------> equation A
mand
<2=<3
so
2<2=60 -----> equation B
Find the value of angle 2
<2=60/2
<2=30 degrees
Find the value of angle 1
substitute the value of <2 in equation A
<1+30=70
<1=70-30
<1=40 degrees
Remember that
<2=<3
so
<3=30 degrees
Find the measure of angle 4
we have that
<1=<4
so
<4=40 degrees
Find the measure of angle EDJ
we have that
mmsubstitute
mm<