A 1/4 of a circle is 90 degrees 1/8 of a circle is 45 degrees and they both add up to 135 degrees
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Half circle plus quarter circle is equal to three-fourths of a circle. Three-fourths of a circle plus one eighth of a circle is seven-eighths. You still need one more eighth to complete the circle.
7/8
Two One-eighth + one-eighth = one quarter
NO A fourth (quarter) is twice one eighth
One eighth is a half of one quarter - if that is what the question was.