Find the value of x
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60⁰ + A = 180⁰(linear pair)
A = 180⁰-60⁰
A = 120⁰
70⁰+ B = 180⁰(linear pair)
B = 180⁰-70⁰
B = 110⁰
angle sum property of polygon is 540⁰
x + x + 20⁰ + 120⁰ + 110⁰ = 540⁰
2x + 250⁰ = 540⁰
2x = 540⁰-250⁰
2x = 290⁰
x = 145⁰
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