# Rotating a Polygon

Author:
kbailey

## Read the directions and complete the problems below.

Step 1: Create a polygon with the following vertices  ﻿ ﻿ ﻿A(-1, 2), B(1, 3), C(2, 5), and D(-2, 4)  Step 2: Decide which point you are rotating around. Use the point tool  (2nd button) to plot a point.  ﻿Note: The point created needs to be bright blue.  If you get a black dot or a light blue dot, delete it.  Create a dot ﻿someplace else and move it to where you need it to be.  Step 3: Rotating  ﻿ ﻿a) Click  (8th button) and choose rotating about a point  ﻿ ﻿b) Click the polygon.  ﻿ ﻿c) Click the center of rotation ﻿ ﻿d) Enter the angle of rotation.  All angles will be entered a positive. Click ﻿ ﻿ ﻿counterclockwise or clockwise for the direction.  Note: If you move points A, B, C, or D the corresponding image point will appropriately change as well.   Problem #1: r(90, O )(ABCD)  ﻿ ﻿ Problem #2: r(-90, (5, 1)) (ABCD) *Perform each transformation within this applet.   ﻿**Take a screen shot of your work (you will have problem #1 and problem #2 on one screenshot.)  Insert it into the appropriate google slide.   ***Geogebra will NOT save your work!!!!