Draw the line of reflection. From a point on the shape, count how far it is vertically from the line of reflection. Count the same amount horizontally on the other side of the line and plot the point.

A rank‐two tensor is built out of the 4‐velocities of two inertial observers, which corresponds precisely to the most general Lorentz matrix connecting the two Cartesian frames of the observers. The ...

Each challenge shows a red shape and its image (outline) under a single unknown transformation (either a reflection, rotation, or translation). Drag the red shape to observe the behavior of its image.

Reflection is a powerful tool in education, especially in math class, where students often face complex and abstract concepts. While math can seem intimidating, integrating structured reflection ...