Trigonometry SOHCAHTOA PowerPoint: Premium GCSE Lesson

A complete, ready to teach GCSE maths lesson on right angled trigonometry. Students learn to label the hypotenuse, opposite and adjacent sides, choose between sine, cosine and tangent, and use them to find missing sides and angles. Every diagram uses the same colour code: hypotenuse coral, opposite purple and adjacent teal, so students can see which ratio to use.

• 31 slides
• About 60 to 70 minutes
• All answers included
• Teacher notes on every slide
• Editable diagrams

Download this PowerPoint free (.pptx)

What the lesson covers

1. Learning objectives at three levels: must, should and could.
2. Warm up on rearranging, rounding and Pythagoras, the skills students need for the lesson, with answers.
3. Naming the sides and a label the sides activity where the angle moves between triangles.
4. SOHCAHTOA and a five step method for choosing and using the right ratio.
5. Finding a missing side: three worked examples, including the case where x is on the bottom, then three your turn questions with answers.
6. Finding a missing angle: inverse trig functions, calculator tips and two worked examples.
7. Practice: six mixed side and angle questions with a full answer slide.
8. Problem solving: angle of elevation to a tree and the safe angle for a ladder.
9. Exact values of sin, cos and tan for 0, 30, 45, 60 and 90 degrees (Higher).
10. Exam style question (3 marks) on a wheelchair ramp, with a mark scheme.
11. Common mistakes, an exit ticket with answers and a key points summary.

Who it is for

GCSE maths, Foundation and Higher tier. It follows on naturally from our premium Pythagoras’ theorem lesson.

Download this PowerPoint free (.pptx)