A circle inscribed in a triangle Student activity Play

A triangle and circles Student activity Play

Activities Student activity Play

An equation Animation Play

An interesting formula to find the area of a polygon Whiteboard exercise Play

An interesting formula to find the area of a polygon Student activity Play

Applying the linear equation Student activity Play

Applying the linear equation Whiteboard exercise Play

Area of a polygon Animation Play

Area of rectangles Whiteboard presentation Play

Area of rectangles Class activity Play

Bigger or smaller Student activity Play

Bigger or smaller Animation Play

Bigger or smaller Whiteboard exercise Play

Building a rectangle Whiteboard exercise Play

Building the polygon with the shortest possible perimeter Simulation Play

Calculating length Whiteboard exercise Play

Calculating length and distance Student activity Play

Calculating the length of a side of a square Whiteboard exercise Play

Calculating the perimeter of a rectangle Whiteboard exercise Play

Calculating the perimeter of a square Whiteboard exercise Play

Calculations involving π Animation Play

Circumference of a circle Student activity Play

Circumference of a circle Animation Play

Coefficients on equal polynomials Whiteboard exercise Play