Find the values of x and y in each of the following figures. b. a, 40 60° 110° 50° 70°
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The interior angle of angle a =180°-110°=70°
the interior angle of angle b=180°-120°=60°
the sum of the angles of a triangle is 180°
70°+60°+x°=180°
130°+x°=180°
x°=50°
therefore x =50°.
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