Direct AB, CD and EF are crossed in a toyaka by O. Prich AB perpendicular to CD AOE IS EQUAL corner to 30 DEGREES. Find a-degree measure of a corner of COF

180-30=150 (from the developed corner of EF it is subtracted 30 degrees) since AOC is equal 90 degrees by definition, COF will be equal to AOF-AOC. 150-90=60 degrees of Answer: COF=60
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