The four angles Whiteboard exercise Play

The frequency of beats Animation Play

The frequency of beats Student activity Play

The frequency of beats Simulation Play

The frequency of beats Whiteboard exercise Play

The frequency of collisions Animation Play

The frequency of free oscillation Student activity Play

The frequency of free oscillation Whiteboard exercise Play

The frequency of oscillation of strings Slideshow Play

The frequency of recombination Whiteboard exercise Play

The frequency of the nerve impulse Whiteboard exercise Play

The frequency of the occurrence of phenotypes and genotypes Whiteboard exercise Play

The frequency of the perceived wave Animation Play

The frequency of the wave perceived by the observer Animation Play

The ice-cream sales at the cafe Ascanio Animation Play

The instruments used for observation of the sky Slideshow Play

The interior angle of a regular polygon Student activity Play

The interior angle of a regular polygon – proof (1) Animation Play

The interior angle of a regular polygon – proof (2) Animation Play

The interior angles of a polygon Student activity Play

The interior angles of an n-sided polygon Whiteboard exercise Play

The interior angles of polygons Whiteboard exercise Play

The keyhole Whiteboard exercise Play

The measure of the angles Whiteboard exercise Play

The measurement of alternating current Student activity Play