LEARN MATH STEP BY STEP THROUGH VERY EASY PROCESS

DRAW OF ANGLE BY PROTRACTOR

__DRAW OF ANGLE BY PROTRACTOR -__

**1. Place the "center point" (at the bottom of this protractor) on the vertex
of the angle.**

**2. Line
up one ray (side) of the angle with the zero degree mark of the protractor. On
this protractor, the zero mark is the bottom edge of the protractor.**

**3. Read the degrees where the other ray of the angle
crosses the protractor.**

**When using a protractor to measure an angle, be sure your answer makes
sense. Take a look at the angle to determine its approximate size.**

**The angle shown at the
right is a 40º angle.**

**One ray of the
angle lies on the bottom edge of the protractor
(the zero tick mark at the right), and the angle OPENS up from that ray.**

**Notice the dashed
blue arrow. It is following the bottom arc
of the degrees, as that is the labeling that started with 0º. The answer is
40º, not 140º.**

**The degrees in this angle are
being read on the top arc of the
labeled degrees since we lined up one of the rays of the angle with the zero tick mark at the left side of the protractor.**

**Follow the red arrow to 75º.**

**When reading an obtuse angle (greater than 90º but less than 180º), remember to read FROM the 0º
location on the starting
ray at the zero tick mark.**

**Follow the red arrow to 115º.**

__Draw 60º angle by Protractor -__

**1. Start
by drawing a straight line (a reference line) that will contain one of the rays
of the angle. A horizontal line will
be the easiest with which to work. Use a ruler or the edge of the protractor to draw this line. No freehand drawing.**

**2. Place a dot on the
line to represent the vertex of the angle.**

**3. Place
the "center point" of the protractor on the dot. Line up the
reference line with the zero degree mark of the protractor.**

**4. Find
the number of degrees you wish your angle to have. Read carefully along the
degree arc. Place a dot at this location.**

**5. Draw
the angle, connecting the dot to the vertex point. Use a straight edge to draw
the final ray of the angle. No free
hand drawing.**

**How to measure an angle
with a protractor:-**

**· Place the midpoint of the protractor on the VERTEX of the angle.**

**· Line up one
side of the angle with the zero line of the protractor (where
you see the number 0).**

**Read the degrees
where the other
side crosses the number
scale.**