Next, students will learn the etymology of the word congruent. That is, they'll see words with similar meaning and learn that congruent means same size and same shape. After that, students will learn that figures are congruent if and only if they have the same shape and size. Then students will learn that corresponding sides and angles in congruent figures are congruent.
Congruent Figures (1 of 2: Introduction) by Eddie Woo
Next, students will learn that figures are congruent if and only if there is a mapping from one to the other via a series of rigid transformations.
Congruent Figures (2 of 2: Transformations) by Eddie Woo
Next, give your students these challenges:
- Triangle Relations by NRICH
- How Big Are Classes 5, 6 and 7? by NRICH
Conclude by leading this investigation:
Half Area Quadrilateral
by MathPickle