Let’s describe ways figures can move in the plane.

Let’s be more precise about describing moves of figures in the plane.

Let’s transform some figures on grids.

Let’s draw and describe translations, rotations, and reflections.

Let’s transform some figures and see what happens to the coordinates of points.

Let’s transform some polygons in the coordinate plane.

Let’s compare measurements before and after translations, rotations, and reflections.

Let’s rotate figures in a plane.

Let’s transform some lines.

Let’s use reasoning about rigid transformations to find measurements without measuring.

Let’s decide whether shapes are the same.

Let’s decide if two figures are congruent.

Let’s find ways to test congruence of interesting figures.

Let’s explore why some angles are always equal.

Let’s explore angles in triangles.

Let’s see why the angles in a triangle add to 180 degrees.

Let's make complex patterns using transformations.