CIRCULAR PROTRACTOR
Objective:
The students will determine the relationship among the various
angle measurements.
Materials:
Four circle masters copied on card stock.
Protractor
Tape or glue stick
Scissors
Procedure:
1.
Number the circles 1, 2, 3, and 4 with 1 being the smallest circle
and 4 being the largest circle.
2.
Cut out Circle #2. Using a protractor, denote the angle measures
of 30 , 45 , and 60 and their multiples. Circle #2 will contain all
of these measures between 0 and 360 .
3.
Cut out Circle #3. Denote the angle measures that are 360
more than the angles in Circle #2. Circle #3 will contain all of these
measures between 360 and 720 .
4.
Cut out Circle #1. Denote the angle measures that are 360
less than the angles in Circle #2. Circle #1 will contain the negative
angle measures between 0 and -360 .
5.
Cut out the circle #4. Denote the angle measures in radians on this
circle. Also include the coordinates for each angle. Circle #4 will
contain angle measures in radians between 0 and 2  . It will also
contain all of the coordinates taken from the unit circle.
6.
Connect the four circles to form concentric circles.