Question

Triangles H J K and L M N are congruent. Triangle H J K is rotated about point H to form triangle L N M. Triangle L M N is higher than triangle H J K.
Two rigid transformations are used to map ΔHJK to ΔLMN. The first is a translation of vertex H to vertex L. What is the second transformation?

a reflection across the line containing HK
a rotation about point H
a reflection across the line containing HJ
a rotation about point K

Answer 1

a rotation about point H

Reason: Translate H to L, then rotate the triangle about that vertex (H, now at L) until the other vertices land on M and N.