# Week 9 Day 1 Opener

Look at triangles

*ABC*and*DEF*below. In this problem segment*AB*is congruent to segment*DE*and segment*BC*is congruent to segment*EF**(this is the information you are*Based on the given information and the definition of "congruence" we know there is a rigid motion that takes__given__).*AB*to*DE*. (rigid motion is a new vocabulary word but it means the same thing as rigid transformation) Figure out what rigid transformation will take*AB*to*DE*and then apply that transformation to triangle ABC below. (actually do the transformation)Why does point *C*' not coincide with point *F*?

Look at triangles

*ABC*and*JKL*below. Given: segment*AB*is congruent to segment*JK*and angle*ABC*is congruent to angle*JKL*. Based on the given information and the definition of "congruence" we know there is a rigid motion that takes*AB*to*JK*. Figure out what rigid motion will take*AB*to*JK*and then apply that transformation to triangle*ABC*below.Why does point *C*' not coincide with point *L*?

Look at triangles

*ABC*and*QRS*below. Given: segment*AB*is congruent to segment*QR,*segment*BC*is congruent to segment*RS**,*and angle*ABC*is congruent to angle*QRS*. Based on the given information and the definition of "congruence" we know there is a rigid motion that takes*AB*to*QR*. Figure out what rigid tranformation will take*AB*to*QR*and then apply that transformation to triangle*ABC*below.Why does point *C*' coincide with point *S*?