---------------------------- now put the values 7 7/8 - 3 1/4 = 63/8 - 13/4 here, take LCM of 8 & 4 which is 8. now, [ (1*63) - (2 * 13) ] / 8 = (63 - 26) / 8 = 37/8 = 4 5/8........................[ here, divide 37 by 8 which gives reminder as 5 and divisible value as 4 ]</span>
The undefined term which is used to define an angle is line i.e., . Further explanation: In geometry the three terms which are considered to be undefined are line, point and plane.