# SAS: Exercise 1

- Author:
- Tim Brzezinski

- Topic:
- Congruence

**The SAS ("Side---Included Angle---Side") Triangle Congruence Theorem states that if 2 sides and their INCLUDED ANGLE of one triangle are congruent to**

**2 sides and their INCLUDED ANGLE of another triangle, then the two triangles are congruent.**

*In the applet below, use the transformational geometry tools of GeoGebra to show that triangle ABC is congruent to triangle DEF.*

*Once you have done so, click the text () tool and type a brief summary of the steps you took to accomplish this task. Be sure to also clearly show how you clearly know these 2 triangles are congruent. (Make sure this text is clearly visible within your applet.)*

**After doing this, save the file (call it**"

**SAS-1**")

**and make it "public".**

**Then, add this worksheet to your GeoGebra Book entitled "Congruent Triangles".**