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ratio is given 3:7.
then let it be 3x and 7x.
by angle sum property of quadrilateral
65°+105°+3x+7x=360°
170°+10x=360°
10x=190
x=190/10
x=19
now, substituting x=19 in 3x and 7x,
we get , 57° and 133° respectively
now , by using angles in a linear pair theorem
57°+x=180°
x=123°
and,
y°+133°=180°
y°=180°-133°
y°=47°
then let it be 3x and 7x.
by angle sum property of quadrilateral
65°+105°+3x+7x=360°
170°+10x=360°
10x=190
x=190/10
x=19
now, substituting x=19 in 3x and 7x,
we get , 57° and 133° respectively
now , by using angles in a linear pair theorem
57°+x=180°
x=123°
and,
y°+133°=180°
y°=180°-133°
y°=47°
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