Home / Interactive Lessons / Shape / GCSE / Year 10 Term 5

Cosine Rule – Finding Lengths

Shape: Interactive Lessons
Cosine Rule - Finding Lengths
Cosine Rule – Finding Lengths
Cosine Rule – Finding Lengths
Cosine Rule – Finding Lengths
Cosine Rule – Finding Lengths

              Cosine Rule – Finding Lengths

              Students learn how to derive and apply the Cosine rule to find missing lengths in triangles.  As learning progresses they are challenged to apply multiple formulae involving triangles to solve more complex problems.
              Differentiated Learning Objectives
              • All students should be able to calculate an unknown length in a non right-angled triangle using the Cosine rule.
              • Most students should be able to calculate a magnitude of direction using bearings and a length in a non right-angled triangle using the Cosine rule.
              • Some students should be able to derive and apply the Cosine Rule to calculate unknown lengths in triangle shapes.
              View online lessonLesson DownloadsDownload PowerPoint Download Notebook Download Flipchart Download WorksheetDownload Interactive Excel File
              Scheme of Work Link
              Trigonometry - Non-Right-Angled Triangles
              Related Blog
              Solving Problems with Non-Right-Angled Triangles 
              IMMEDIATE DOWNLOAD
              SKU: 066 Categories: , , , , ,

              You may also like...

              Shape
              Shape
              Interactive Lessons

              Pythagoras’ Theorem – Finding the Hypotenuse

              Students learn how to derive and apply Pythagoras' Theorem to find the hypotenuse of right-angled triangles.  A...
              GCSE / Year 9 Term 6
              Interactive Lessons
              Shape
              Shape
              Interactive Lessons

              Pythagoras’ Theorem – Shorter Sides

              Students learn how to calculate a shorter side of a right-angled triangle using Pythagoras' Theorem.  As learni...
              GCSE / Year 9 Term 6
              Interactive Lessons
              Shape
              Shape
              Interactive Lessons

              Exact Trigonometric Solutions

              Students learn how to solve trigonometrical equations with exact solutions using special triangles.   As learnin...
              GCSE / Year 11 Term 2
              Interactive Lessons

              Related Mr Mathematics Products

              Shape
              Shape
              Interactive Lessons

              Total Surface Area of Prisms

              Students learn how to calculate the surface area of spheres firstly by considering the net of a cuboid and later...
              GCSE / Year 11 Term 2
              Interactive Lessons
              Shape
              Shape
              Interactive Lessons

              Trigonometry – Area of Triangles

              Students learn how to derive and apply the area formulae for non-right-angles.  As learning progresses they are ...
              GCSE / Year 10 Term 5
              Interactive Lessons
              Shape
              Shape
              Interactive Lessons

              Volume and Surface Area of Spheres

              Students learn how to calculate the volume and surface area of spheres using the formulae.  As learning progress...
              GCSE / Year 11 Term 2
              Interactive Lessons
              Shape
              Shape
              Interactive Lessons

              Enlargements on a Grid

              Students learn how to perform and describe enlargements using a centre and scale factor.  As learning progresses...
              GCSE / Year 9 Term 5
              Interactive Lessons

              Mr Mathematics Teaching Resources Term by Term

              Year 7 Term 1 Year 7 Term 2 Year 7 Term 3 Year 7 Term 4 Year 7 Term 5 Year 7 Term 6
              Year 8 Term 1 Year 8 Term 2 Year 8 Term 3 Year 8 Term 4 Year 8 Term 5 Year 8 Term 6
              Year 9 Term 1 Year 9 Term 2 Year 9 Term 3 Year 9 Term 4 Year 9 Term 5 Year 9 Term 6
              Year 10 Term 1 Year 10 Term 2 Year 10 Term 3 Year 10 Term 4 Year 10 Term 5 Year 10 Term 6
              Year 11 Term 1 Year 11 Term 2 Year 11 Term 3 Year 11 Term 4 Year 11 Term 5

              Mr Mathematics Blog

              Getting Ready for a New School Year

              August 22, 2019

              When getting ready for a new school year I have a list of priorities to work through. Knowing my team have all the information and resources they need to teach their students gives me confidence we will start the term in the best possible way.  Mathematics Teaching and Learning Folder All teachers receive a folder […]

              Mathematics OFSTED Inspection – The Deep Dive

              July 6, 2019

              Earlier this week, my school took part in a trial OFSTED inspection as part of getting ready for the new inspection framework in September 2019. This involved three Lead Inspectors visiting our school over the course of two days. The first day involved a ‘deep dive’ by each of the Lead Inspectors into Mathematics, English […]

              How to Solve Quadratics by Factorising

              June 30, 2019

              The method of how to solve quadratics by factorising is now part of the foundational knowledge students aiming for higher exam grades are expected to have.   Here is an example of such a question. Solve x2 + 7x – 18 = 0 In my experience of teaching and marking exam papers students often struggle with […]