A carpet problem Animation Play

Application of Harry's formula Whiteboard exercise Play

Harry's formula Animation Play

Square of a sum – substituting into a formula Whiteboard exercise Play

Square of a sum – substituting into a formula Student activity Play

Substituting into a formula Animation Play

Substituting into a formula connected with numbers Whiteboard exercise Play

Substituting into formulas connected with a right-angled triangle Student activity Play

Substituting into formulas connected with any triangle Student activity Play

Substituting into formulas connected with numbers Student activity Play

Substituting into formulas connected with quadrangles Student activity Play

Substituting into formulas connected with quadrangles Whiteboard exercise Play

Substituting into formulas connected with triangles Whiteboard exercise Play

Substituting into the formulas Class activity Play

Substituting into the formulas Whiteboard presentation Play

Substituting – a complex problem Student activity Play

Substituting – a complex problem Whiteboard exercise Play