2-dimensional shapes
Explore the refreshed revision guide for GCSE Maths: Polygons, with step-by-step slideshows, quizzes, practice exam questions, and more!
2-dimensional (2D) shapes have only two dimensions, Distance from one end to the other. How long something is, its longest dimension. and The measurement of something from side to side..
A polygon is a closed 2D shape with straight sides. Polygons are named depending on the number of sides:
- Triangle (3 sides)
- Quadrilateral (4 sides)
- Pentagon (5 sides)
- Hexagon (6 sides)
- Octagon (8 sides)
A regular polygon has sides that are equal in length and equal angles. A regular triangle is called an equilateral triangle. A regular quadrilateral is called a square.
More guides on this topic
- NEW: Angles
- NEW: Angles in parallel lines
- NEW: Polygons
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- NEW: Ruler and compass constructions
- NEW: Loci
- NEW: Bearings
- NEW: Perimeter
- NEW: Area
- NEW: Volume of a prism
- NEW: Surface area of a prism
- NEW: Pyramids, cones and spheres
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- NEW: Circumference and arc length
- NEW: Area of circles and sectors
- NEW: Higher – Circle Theorems – Calculating angles using circles
- NEW: Higher – Using the alternate segment theorem, tangents and chords
- NEW: Reflection
- NEW: Rotation
- NEW: Translation
- NEW: Enlargement
- NEW: Higher − Negative enlargements
- NEW: Higher – Combined transformations and invariant points
- NEW: Congruent and similar shapes
- NEW: Higher – Similarity in 2D and 3D shapes
- NEW: Pythagoras' theorem
- NEW: Solving 2D and 3D problems using Pythagoras' theorem
- NEW: Right-angled trigonometry
- NEW: Exact trigonometric values
- NEW: Higher – Sine rule – OCR
- NEW: Higher – Cosine rule
- NEW: Higher – 2D and 3D trigonometry problems
- NEW: Vectors
- NEW: Higher – Geometric problems using vectors
- Angles, lines and polygons - OCR
- Loci and constructions - OCR
- 3-dimensional solids - OCR
- Circles, sectors and arcs - OCR
- Circle theorems - Higher - OCR
- Transformations - OCR
- Pythagoras' theorem - OCR
- Units of measure - OCR
- Trigonometry - OCR
- Vectors - OCR
