Area of a triangle
Architects and engineers frequently use triangulation to create strong, stable
Geometry and Shape
Interactive geometry, shape and measures worksheets.
Converting metric units of area
Whether you're calculating the size of a garden,
Perigal's dissection
Perigal’s Dissection is a brilliant visual proof of Pythagoras’
Pythagoras and isosceles triangles
Architects and engineers often use isosceles triangles when designing roofs,
Non-calculator trigonometry using exact values
Trigonometry is everywhere—from designing buildings to coding 3D video
Angle at the centre
Demonstration of the circle theorem stating that "the angle
Perimeter of compound rectangles
Ever tried figuring out how much fencing you need for
Loci demonstration
Stanley the Sheep's Grazing Area
Stanley is tethered
Circumference in terms of pi
Knowing how to calculate the **circumference of a circle in
Approximating pi with polygons
This visualisation shows how π can be approximated by using