Khan Academy explains the difference between rotations, reflections, and translations.

Non-Rigid Transformations

Khan Academy teaches us about dilation, a non-rigid transformation.

Similar vs. Congruent

MashUp Math is taking over for this lesson and explaining what similarity and congruence in geometry is.

Parallel Lines

Khan Academy looks at parallel lines, transversals, and their angles.

Interior Angles

Khan Academy establishes why the interior angle sum of all triangles is 180 degrees.

Transformations: Help identify if these images have been rotated, reflected, or translated!

Similar vs. Congruent: Can you pick out which shapes are similar or congruent? Flash Player Required.


See how many points you can collect in Pythagorean theorem jeopardy!

Pythagorean Theorem

Khan Academy teaches the Pythagorean theorem.

Distance Equation

Khan Academy shows how to use the Pythagorean theorem to find the distance between two points in a coordinate plane.


Khan Academy teaches us the volume of a cylinder.


Khan Academy teaches us the volume of a cone.


Khan Academy teaches us the volume of a sphere.