The answer should then be changed to feet and inches
To divide feet and inches by feet and inches, change
to inches or feet (decimals).
Same problem as above by use of ft (decimals).
It will divide 4 times with .33 ft remainder.
MEASUREMENT OF ANGLES
RELATIONSHIP OF ANGLES
Observe that two straight lines have been drawn to
form four right angles.
In order to have a way to measure angles, a system
of angle-degrees has been established. Assume that each
of the four right angles is divided into 90 equal angles.
The measure of each is 1 angle degree; therefore, in the
four right angles, there are 4 x 90°, or 360 angle-
degrees. For accurate measurement, degrees have been
subdivided into minutes and minutes into seconds.
1 degree= 60 minutes (). 1 minute= 60 seconds ().
When two lines are drawn in different directions
from the same point, as shown below, an angle is
formed. /is the symbol for angle, and this angle is
described as Z ABC or simply L B. B is the vertex of
the 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°, but
less than 180°.
Reflex anglean angle greater than 180°.
L ZOY and L ZOX are supplementary angles
and their total measure in degrees is equal to
180°. When one straight line meets another, two
supplementary angles are formed. One is the
supplement of the other.
Z DAC and Z CAB are complementary angles
and 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 vertical
angles and are equal.
PON are a pair of vertical angles
and are equal.
When two straight lines cross, two pairs of vertical
angles are formed. Pairs of vertical angles are equal.