Answer:
Below
Explanation:
All of the internal angles of any triangle sum to 180
find 'x' then F = 5x - 7
8x -18 + 6x-4 + 5x-7 = 180 °
19x -29 = 180
x = 11°
F = 5x -7 = 5(11) - 7 = 48°
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