Learning goals: Teacher Facing Compare and contrast (orally and in writing) side lengths, angle measures, and areas using rigid transformations to explain why a shape is or is not congruent to another. Comprehend that congruent figures have equal corresponding side lengths, angle measures, and areas. Describe (orally and in writing) two figures that can be moved to one another using a sequence of rigid transformations as “congruent.” Full lesson plan (warm-up, activities, synthesis, cool-down prompt) from 8.1 Rigid Transformations and Congruence, Grade 8.