Use a protractor and each trisected angle will measure 18 degrees and 20 minutes
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3. trisect means three
Three ! The answer is in the question !
An equilateral triangle has 3 equal angles of 60 degrees that add up to 180 degrees and trisecting a 60 degree angle equally would give 3 equal 20 degree angles.
128 cuz 180 take away 55 is 128
An equilateral triangle on on of the arms of the right angle.