Parts of a circle
A chord is a straight line joining two points on the circumference of a circle.
An The curve between two points on the circumference of a circle. is a part of the circumference of a circle.
A segment is an area enclosed by a chord and an arc.
A sector is an area enclosed by two The distance from the centre of a circle to its circumference. The plural of radius is radii. and an arc.
A tangent is a straight line which touches the edge of a circle once.
More guides on this topic
- NEW: Angles
- NEW: Angles in parallel lines
- NEW: Polygons
- NEW: Line and rotational symmetry
- NEW: Constructing triangles
- 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
- NEW: Nets, plans and elevations
- NEW: Circumference and arc length
- NEW: Area of circles and sectors
- NEW: Higher – 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: Higher – Sine rule – OCR
- Angles, lines and polygons - OCR
- Loci and constructions - OCR
- 2-dimensional shapes - OCR
- 3-dimensional solids - OCR
- Circle theorems - Higher - OCR
- Transformations - OCR
- Pythagoras' theorem - OCR
- Units of measure - OCR
- Trigonometry - OCR
- Vectors - OCR
