Question

#4. Find the missing angle measures

Answer 1

x°=130°

The sum of two opposite angles in a quadrilateral is 180

⇒x+55°+x+65°=180°

⇒2x+120°=180°

⇒2x=60°

⇒x=30°

Có x+20 °+x°=180°

⇒30°+20°+x°=180°

⇒x°=130°

Answer 2

Explanation:

x = 55

x + 55 = 110

x + 20 = 75

x + 65 = 120