Back to Prove triangles congruent — Problem 2 · Task Set 7

Exercises: Prove Triangles Congruent Using Rigid Motions

Work through each section in order. Show your reasoning where indicated.

Grade 9·20 problems·~35 min·Common Core Math - HS Geometry·standard·hsg-co-b-7

Work through problems with immediate feedback

Warm-Up: Review What You Know

These problems review skills from earlier lessons.

The notation " $\triangle ABC \cong \triangle FDE$ " tells us that vertex $A$ corresponds to vertex $F$ , vertex $B$ corresponds to vertex $D$ , and vertex $C$ corresponds to vertex $E$ . Under this correspondence, which pair of sides must be congruent?

$AB$ and $FD$

$AB$ and $DE$

$BC$ and $FD$

$AC$ and $DE$