The Maths Habit

Area of a triangle: ½ab sin C

Trigonometry · Higher · 6:04

Worksheet (PDF) Answers (PDF)

Chapters

  1. 0:00Introduction
  2. 0:23Do Now
  3. 1:03Where the formula comes from
  4. 1:49Which angle?
  5. 2:18Example 1: finding the area
  6. 2:54Example 2: finding a missing side
  7. 3:36Your turn
  8. 4:20Common mistake
  9. 5:00Worksheet and exit question

Practise the area of a triangle using sine for 15 minutes a day in The Maths Habit, on your phone or in your browser.

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