Circle Sectors and Triangles | Year 2 Pure | A Level Maths
Radians simplify the arc length and sector area formulae enormously. In this lesson you will learn how to use s = r theta for arc length and A = (1/2) r^2 theta for the area of a sector of a circle, combine these with triangle area formulae such as (1/2) ab sin(C), and tackle composite shapes that combine sectors and triangles. The lesson covers worked examples on shaded regions and the perimeter of a sector.
Your A Level maths journey
We're with you every step of the way. Click here to find out more about the journey.
Only follow this arrow when you have covered the whole curriculum.
Lesson Video On Circle Sectors and Triangles
Follow the lesson video carefully with a pen and paper. By the end of it you should be comfortable with this topic. If you want a blank copy of this lesson to follow along, scroll down to the PDF viewer below and select “Student Notes Template” and download using the link at the top of the PDF viewer.
Lesson Resources For Circle Sectors and Triangles
Here you will find all of the PDF resources for the lesson on Circle Sectors and Triangles. Please choose from the dropdown menu below. You are able to download worksheets and notes templates to help you follow the video lesson. Mark schemes and solutions are not downloadable.
Finding this resource useful? Share it with a friend!