12.4. Rotations http://www.ck12.org
In this Concept, our center of rotation will always be theorigin.Rotations can also be clockwise or counterclock-
wise. We will only docounterclockwiserotations, to go along with the way the quadrants are numbered.
Investigation: Drawing a Rotation of
Tools Needed: pencil, paper, protractor, ruler
- Draw 4 ABCand a pointRoutside the circle.
- Draw the line segmentRB.
- Take your protractor, place the center onRand the initial side onRB. Mark a 100◦angle.
- FindB′such thatRB=RB′.
- Repeat steps 2-4 with pointsAandC.
- ConnectA′,B′,andC′to form 4 A′B′C′.