Find the area of a triangle using A = 1/2 x height x base or Heron’s formula. Find the perimeter of a triangle. Apply the “Isosceles Triangle Theorem” to determine an unknown side length or ...

Revise how to calculate the area of a triangle. Learn how to calculate the triangle's area by first finding the area of a rectangle in this BBC Bitesize maths guide.

Create an expression for and use optimisation to find the greatest/least value(s) a function can take as well as the rate of change in Higher Maths.