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!!!!
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!!!!