The sum of the exterior angles in an n-sided polygon Whiteboard exercise Play

The sum of the exterior angles of a convex pentagon Animation Play

The sum of the exterior angles of a convex polygon Student activity Play

The sum of the exterior angles of a convex polygon Animation Play

The sum of the exterior angles of a hexagon Whiteboard exercise Play

The sum of the exterior angles of a pendecagon Whiteboard exercise Play

The sum of the interior angles in the polygons Whiteboard exercise Play

The sum of the interior angles of a quadrilateral – proof Animation Play

The tangent – reducing angles Whiteboard exercise Play

The tangent – reducing angles Student activity Play

The transversal and angles Whiteboard exercise Play

The transversal and angles Student activity Play

Transformations Student activity Play

Transforming functions Animation Play

Transforming sine- and cosine-like functions Student activity Play

Triangles in LOGO Student activity Play

Trigonometric functions of quadrantal angles Student activity Play

Trigonometric functions of quadrantal angles Whiteboard exercise Play

Trigonometric functions of the sum and difference of angles (1) Whiteboard presentation Play

Trigonometric functions of the sum and difference of angles (1) Class activity Play

Trigonometric functions of the sum and difference of angles (2) Class activity Play

Trigonometric functions of the sum and difference of angles (2) Whiteboard presentation Play

Trigonometric ratios – the angles of the triangle Whiteboard exercise Play

Two isosceles triangles Whiteboard exercise Play

Two right-angled triangles Whiteboard exercise Play