# Dilating a Polygon

Author:
kbailey

## Read the directions and complete the problems below.

Step 1: Create a polygon. This time, let's create a regular polygon. A regular polygon is a polygon is that has all sides equal and all angles equal.  A square is an example of a regular polygon.  ﻿ ﻿a) Click the polygon tool  and select regular polygon.  ﻿b) This tool will require you graph two points.  (graph any two points) ﻿c)  Then enter the number of vertices.  (let's do 6 for this example) Step 2: Decide which is your center of dilation. Use the point tool  (2nd button) to plot a point, unless the point is a vertex of your polygon.   ﻿Note: The point created needs to be dark 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: Dilating ﻿ ﻿a) Click  (8th button) and choose dilating from a point  ﻿ ﻿b) Click the polygon.  ﻿ ﻿c) Click the center of dilation ﻿ ﻿d) Enter the scale factor.   Note: If you move the vertices, the corresponding image point will appropriately change as well.   Problem #1: D 5(ABCDEF) with (0, 0) as the center of dilation. ﻿ ﻿ Problem #2:D 1/5 (ABCDEF) with as Point A. ﻿ *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!!!!