The answer should then be changed to feet and inchesTo divide feet and inches by feet and inches, changeto inches or feet (decimals).Example:Example:Same problem as above by use of ft (decimals).It will divide 4 times with .33 ft remainder.MEASUREMENT OF ANGLESRELATIONSHIP OF ANGLESANGLES1.2.3.4.Observe that two straight lines have been drawn toform four right angles.In order to have a way to measure angles, a systemof angle-degrees has been established. Assume that eachof the four right angles is divided into 90 equal angles.The measure of each is 1 angle degree; therefore, in thefour right angles, there are 4 x 90°, or 360 angle-degrees. For accurate measurement, degrees have beensubdivided into minutes and minutes into seconds.1 degree= 60 minutes (’). 1 minute= 60 seconds (“).When two lines are drawn in different directionsfrom the same point, as shown below, an angle isformed. /is the symbol for angle, and this angle isdescribed as Z ABC or simply L B. B is the vertex ofthe angle. AB and CB are the sides of the angle.Angles are of four types:Right angle-a 90° angle.Acute angle-an angle less than 90°.Obtuse angle-an angle greater than 90°, butless than 180°.Reflex angle—an angle greater than 180°.1.2.LZOY and L ZOX are supplementary anglesand their total measure in degrees is equal to180°. When one straight line meets another, twosupplementary angles are formed. One is thesupplement of the other.Z DAC and Z CAB are complementary anglesand their total is a right angle or 90°.Two angles whose sum is 90° are said to be comple-mentary, and one is the complement of the other.3. L MOP and Z RON are a pair of verticalangles and are equal.MOP andPON are a pair of vertical anglesand are equal.When two straight lines cross, two pairs of verticalangles are formed. Pairs of vertical angles are equal.AII-3

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