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(a) The complement of an angle is the angle that, when added to the given angle, equals 90 degrees.
To find the complement, subtract the given angle from 90 degrees:
90 degrees - 64 degrees = 26 degrees.
Therefore, the measure of its complement is 26 degrees.
(b) The supplement of an angle is the angle that, when added to the given angle, equals 180 degrees.
To find the supplement, subtract the given angle from 180 degrees:
180 degrees - 107 degrees = 73 degrees.
Therefore, the measure of its supplement is 73 degrees.