Reflecting a Polygon
- Author:
- kbailey
Read the directions and complete the problems below.
Step 1: Create a polygon with the following vertices
A(-4, 1), B(-2, 4), C(3, 1), and D(-1, -1)
Step 2: Decide which line you are reflecting over.
*If you are reflecting across either axis, move to step 4
*If you are reflecting over a line that is NOT an axis, the line must first be graphed.
Step 3: Graphing a line
a) Click
(3rd button). This tool will let you graph using two points.
b) Graph a line (in y = mx+b form)
c) The line can move by dragging either point.
Step 4: Reflecting
a) Click 
(8th button) and choose reflecting about a line.
b) Click the polygon.
c) Click the line of reflection (axis or the line you've graphed)
Note: If you move points A, B, C, or D the corresponding image point will appropriately change as well.
Problem #1: R x-axis(ABCD)
Problem #2: R y=-1/2x +4(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!!!!
(3rd button). This tool will let you graph using two points.
b) Graph a line (in y = mx+b form)
c) The line can move by dragging either point.
Step 4: Reflecting
a) Click (8th button) and choose reflecting about a line.
b) Click the polygon.
c) Click the line of reflection (axis or the line you've graphed)
Note: If you move points A, B, C, or D the corresponding image point will appropriately change as well.
Problem #1: R x-axis(ABCD)
Problem #2: R y=-1/2x +4(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!!!!