Read your relevant specification here to know what you have to learn. We currently have the following maths notes on WJEC GCSE Maths Unit 3 Geometry and Measures: (The notes are in alphabetical order to make it easier to find the specific one)

- 3D Plans
- Angles and Straight Lines
- Angles in Three Dimensional Solids
- Angles of Elevation and Depression
- Area and Perimeter of a Sector (Part of a Circle)
- Bearings
- Bisecting a Line
- Bisecting an Angle
- Circle Theorems – A Summary
- Constructing a Triangle With Given Sides
- Constructing an Angle of Thirty Degrees
- Constructing the Locus of Points a Fixed Distance From a Given Line
- Drawing Three Dimensional Solids With a Constant Cross Section
- Finding the Locus of Points Equidistant From Two Given Points
- Parts of a Circle
- Planes of Symmetry
- Proof of Formula for Curved Surface Area of Cone
- Proof of Formula for the Area of a Triangle
- Proof That a Line From a Point to the Centre of a Circle Bisects the Angle Between Two Tangents Drawn From That Point
- Proof That a Triangle Drawn in a Semicircle is Right Angled
- Proof That Angles Subtended in a Circle From the Same Chord (Angles in the Same Segment) Are Equal
- Proof That Opposite Angles in a Cyclic Quadrilateral Add to 180 Degrees
- Proof That Tangents From a Point to a Circle Are Equal in Length
- Proof That the Angle Between a Chord and a Tangent at the Point of Contact is Equal to the Angle in the Alternate Segment
- Proof That the Angle Subtended by an Arc at the Centre of a Circle is Twice the Angle Subtended at the Circumference
- Proving Triangles are Congruent
- Pythagoras Theorem
- Quadrilaterals
- Ratios and Similar Shapes
- Scale Factors and Negative Enlargements
- Solving Cosine Equations for More Than One Solution
- Solving Sine Equations for More Than One Solution
- Surface Areas of Frustums
- Tessellations
- The Ambiguous Case
- The Cosine Rule
- The Distance Between Two Points
- The Sine Rule
- Transformations – Summary – Translations, Reflections, Rotations, Enlargements
- Transformations of Graphs
- Trigonometry and Right Angled Triangles – Finding a Side
- Trigonometry and Right Angled Triangles – Finding an Angle
- Vectors I
- Vectors II
- When to Use the Cosine Rule and When to Use the Sine Rule
- Working With Column Vectors

- Constructing a Right Angle
- Constructing an Angle of 45 Degrees
- Constructing an Equilateral Triangle/60 Degree Angle
- Constructing the Locus of Points a Fixed Distance From a Given Line
- Density of a Mixture Made of Substances in a Certain Ratio
- How Many Times Does a Wheel Turn When Travelling One Kilometre
- Lapping Racing Drivers
- Lengths, Areas and Volumes
- Nets and Surface Areas
- Relation Between Lengths of Solids With Volumes in a Certain Ratio
- Scales and Maps
- Surface Areas of Different Shapes
- Units, Conversion Factors and Constants
- Volume
- Volumes of Frustums

If you believe that there are any mistakes with the notes or that there are notes missing, then please contact us here. We advise you to use the google custom search engine for our website on the left to find any notes that you think are missing from this section as those particular notes might be somewhere else on this website. These notes are mostly for the WJEC specification but we have found it difficult to accommodate each specification for each module so contact us if you have a solution or if there are notes missing for a specification that you think should be here. We are trying to make this a maths website for all. Any help or feedback will be appreciated.