Drag any point on triangle ABC to resize the triangle. Study what happens to triangle DEF when you resize triangle ABC. Also try to coincide (put one triangle on top of the other) and see if they match up.
What combination of parts of the triangle are highlighted and compared?
The combination is made up of 2 angles and a side.
Looking at the diagram, is the side between the two angles?
Yes. The side is between the two angles.
Can the combination side-angle-side (SAS) be used to make the two triangles congruent?
Yes, side-angle-side (SAS) can be used to prove that the two triangles are congruent to each other.