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GeoGebraClasse GeoGebra

Proving Triangles Similar by Dilation

STUDENTS: Please watch this quick video to learn how to DILATE FROM A POINT in GeoGebra. By mapping the original colored triangle into the outlined triangle by dilation, we are showing the triangles to be SIMILAR.

Use the DILATE FROM POINT tool to dilate the colored triangle about point O. When doing so, enter "k" (without the " ") as your SCALE FACTOR to complete your task.

Use the DILATE FROM POINT tool to dilate the colored triangle about point O. When doing so, enter "k" (without the " ") as your SCALE FACTOR to complete your task.

Use the DILATE FROM POINT tool to dilate the colored triangle about point O. When doing so, enter "k" (without the " ") as your SCALE FACTOR to complete your task.

Use the DILATE FROM POINT tool to dilate the colored triangle about point O. When doing so, enter "k" (without the " ") as your SCALE FACTOR to complete your task.

Same directions as in the previous apps. Yet this time, you may need to move point O as well!

Same directions as in the previous apps. Yet this time, you may need to move point O as well!

Same directions as in the previous apps. Yet this time, you may need to move point O as well!