If angle GEF is thirteen less than five times angle DEG and angle DEF=149⁰, find angle GEF

How do you find the area of this triangle.

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Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35