- circle
- Circle Area (By Peeling!)
- Analog Clock
- D Period Unit Circle Project Daphne Choi
- Spirograph-Epitrochoid Earth and Moon
- The Crazy Circle Illusion: How are these dots moving? GeoGeb
- Where to Sit? (I)
- GoGeometry Action 19!
- Area of Circles
- circle and chord
- nine-point circle
- Animation 20 (Inscribed Angle Dance!)
- reflection on a unit circle
- Copy of Radians in Unit Circle
- Animation 3
- Animation 70
- Area of circle
- Animation 222
- circle-1
- Area of a Circle
- Equilateral Action (3)!
- Animation 45
- Constructing Tangents to a Circle
- Envelope of circle tangents
- Seven Circles Theorem
- Four Semi-circles
- GoGeometry Action 10!
- 아폴리니우스의 원
- Tangent Circles
- How Fast are You Spinning?
- Circle mandala
- measurements in a circle
- Homothey in three tangent circles
- Copy of Area of a Circle
- moon and sea
- Unit Circle and Sine & Cosine Graphs
- Unit Circle by Tom Owsiak
- Area of a Circle Animation (Parallelogram)
- archimedes' twin circles
- area of a circle-1
- Ferris Wheel Unit Circle
- String Art 15 Point Circle Solution
- Rolling Coin 滾動的硬幣
- circle
- Circle Project
- Area of a Circle - Wedge Demo 1
- section of sphere
- Animation 78
- Seven Circle's Theorem in English
- Animation 233
- Investigation 7-1
