Byron S. answered • 11/20/14

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Hi Nathan,

The sum of the four angles of a quadrilateral is 360°, so you know that

D + E + F + G = 360

105 + 90 + (16x-1) + (12x-2) = 360

Combining like terms, you get

28x + 192 = 360

28x = 168

x = 6

You're asked to find angle G,

G = 12x - 2

G = 12(6) - 2

G = 72-2 = 70°

Nathan S.

11/20/14