A staircase Animation Play

A staircase Student activity Play

A triangle cut into two right-angled triangles Whiteboard exercise Play

A triangle symmetrical with respect to a line Student activity Play

AA property of similar triangles Animation Play

AA property of similar triangles Student activity Play

Adaptations of different organisms to similar environments Slideshow Play

Add and subtract similar terms Student activity Play

Add and subtract similar terms Whiteboard exercise Play

All the possible triangles Whiteboard exercise Play

Angle-Angle property (AA) Whiteboard exercise Play

Angles and sides of triangles Whiteboard exercise Play

Angles and sides of triangles Student activity Play

Angles in special triangles Whiteboard exercise Play

Angles in triangles and quadrilaterals Class activity Play

Angles in triangles and quadrilaterals Whiteboard presentation Play

Angles of special triangles Student activity Play

Are all trigonometric functions really necessary? Student activity Play

Are the two triangles similar? Animation Play

Are two polygons similar? Animation Play

Areas of plane shapes (1) Class activity Play

Areas of plane shapes (1) Whiteboard presentation Play

Areas of polygons made of triangles – problems Whiteboard exercise Play

Areas of polygons made of triangles – problems Student activity Play

Areas of similar figures Student activity Play