Applying the Pythagorean theorem Animation Play

Approximating the area under a line in the coordinate system Student activity Play

Approximating the area under the line in the coordinate system Whiteboard exercise Play

Arbitrary shapes bounded by straight lines Student activity Play

Arbitrary shapes bounded by straight lines Whiteboard exercise Play

Are there any solutions? Student activity Play

Are you good at estimating lengths? Student activity Play

Areas of figures Student activity Play

Areas of various shapes Student activity Play

Arms of the angle and parallel lines Whiteboard exercise Play

Arms of the angle and parallel lines Student activity Play

Arrangements in a ring Student activity Play

Arrangements in a ring Animation Play

Atomic spectra Whiteboard presentation Play

Atomic spectra Class activity Play

Atomic spectrum of hydrogen Student activity Play

Attraction and repulsion Student activity Play

Blot and symmetry Animation Play

Building a square from two squares Animation Play

Building the polygon with the biggest possible area Whiteboard exercise Play

Calculating the gradient of a line Animation Play

Calculating the radius, given the area Student activity Play

Cartesian equations describing a line in space Whiteboard exercise Play

Central and inscribed angles on the same arc Student activity Play

Central symmetry Animation Play