x

From base and height to any triangle

From base and height to any triangle

Triangle with base a, sloping side b, included angle theta at the base, and perpendicular height h dropped to the base

You already know the triangle area formula A=12×base×heightA=\frac{1}{2} \times \text{base} \times \text{height}A=21​×base×height. That works when the height is the perpendicular distance to the base, even if the height is not already drawn.

Finding the Area of Any Triangle Lesson

  1. IGCSE
  2. /Maths
  3. /Finding the Area of Any Triangle

Step-by-step lessons covering Oxford AQA IGCSE Maths Finding the Area of Any Triangle for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 (Core: 1C and 2C; Extension: 1E and 2E) format. Since content from any part of the specification can appear on either paper, keep number and algebra fluency sharp throughout the course rather than leaving it until near the exam.

Lessons