Symmetry and congruency Whiteboard presentation Play

Symmetry in a circle Simulation Play

Symmetry in a circle Student activity Play

Symmetry line Whiteboard exercise Play

Symmetry with respect to a line Animation Play

Symmetry with respect to a line and rotation through 90° Student activity Play

Symmetry with respect to a line and rotation through 90° Whiteboard exercise Play

Tangent parallel or perpendicular to a line Student activity Play

Tangent parallel to a line Whiteboard exercise Play

Tangent perpendicular to a line Whiteboard exercise Play

Tangent to a circle Whiteboard exercise Play

Tangent to a circle Student activity Play

Tangent to a circle through a point not on the circle Whiteboard exercise Play

Tangent to a circle through a point not on the circle Student activity Play

Tangent to a parabola Student activity Play

Tangent to a parabola parallel to the given line Whiteboard exercise Play

Tangents Simulation Play

Tangents Student activity Play

Television Student activity Play

Television Slideshow Play

Testing current in a parallel circuit Illustration Play

The area of a triangle Animation Play

The bisector of a line Whiteboard exercise Play

The bisector of a line Whiteboard exercise Play

The bisector of a line Student activity Play