2:49 Parts of the Circle - Corbettmaths
Names and defines every part of a circle, the standard reference for this exact topic.
Circle terminology
Understand and use terminology related to the parts of a circle
3 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.
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3:25 GCSE Maths - What are Chords, Segments, Arcs and Sectors? (Circles Part 2) (2026/27 exams)
Clear definitions of chords, segments, arcs and sectors, with minor and major versions explained.
1:26 Circle Terminology - Radius Diameter Sector Segment Chord Arc Tangent | Geometry | Math | FuseSchool
Quick tour of radius, diameter, sector, segment, chord, arc and tangent in one go.