The ratio of perimeters Whiteboard exercise Play

The ratio of two values Student activity Play

The ratio of two values Animation Play

The rhombus Student activity Play

The shortest possible perimeter Animation Play

The three circles Whiteboard exercise Play

The trapezium Student activity Play

Three fourths of a circle Animation Play

Three rectangles and their perimeters Whiteboard exercise Play

Trapezium Whiteboard exercise Play

Trapezium Student activity Play

Two circles and a line Whiteboard exercise Play

Two circles and a line Student activity Play

Two rectangles and their perimeters Whiteboard exercise Play

What are algebraic expressions used for? Whiteboard exercise Play

What are algebraic expressions used for? Student activity Play

What is a perimeter? Student activity Play

What is a perimeter? Animation Play