Investigating Geometry with GeoGebra

Henrico County Public Schools

How are these triangles related to each other?

READ the instructions on the right and INTERACT with the GeoGebra applet below.

Sorry, the GeoGebra Applet could not be started. Please install Java 1.4 (or later) to use this page.

Investigation Steps

Click on the reset icon icon to reset the diagram.

Be sure to show diagrams, explain why and make specific references to what happened when you constructed and measured the triangles.

Let A =(2, 4), B =(4, 5), C =(6, 1),
Let D =(7, 3), E =(9, 4), and F =(11, 0).

Use the Polygon tool, polygon tool to connect the points and create the 2 triangles.

ΔABC and ΔDEF are specially related to each other.

Make calculations to clarify this statement, and write a few words to describe what you discover.

Use the angle tool, angle tool to measure the angles of each triangle.
Use the text tool, text tool to measure the length of the segment AB by typing "AB = " + measure[A,B]".