In △GHI, if ∠G = 3x +60, ∠H = 40 and ∠I = 2x + 45, what is the longest side?
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Answer:
3x°+60°+40°+2x°+45° = 180°
5x°+145° = 180°
5x° = 180°-145°
5x° = 35°
X° = 35/5°
X° = 7°
Longest side = 3x+60
= 3(7)+60
= 21+60
= 81°
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