Intro to circle terminology: radius, arcs, chords, and tangents
Intro to circle terminology: radius, arcs, chords, and tangents
7:35
About this lesson
- Radius
- Diameter
- Circumference
- Central angle
- minor arc
- major arc
- Inscribed angle
- Chord
- perpendicular bisector
- Tangent
- point of tangency
Key Moments
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Video 1 of 10
Intro to circle terminology: radius, arcs, chords, and tangents
8 min
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Three methods for calculating arc length of a circle
9 min
Finding arc length given a degree angle and radius
2 min
Calculating arc length from diameter and degree angle
2 min
Calculating arc length by converting degrees to radians
1 min
Finding arc length AB using vertical opposite angles
2 min
Finding the arc length from A to B to E using angle and circumference
3 min
Finding arc length from A to E to C using sector angle and semicircle
3 min
Finding angle BFD using perpendicular lines and angle addition
1 min
Proving point E must lie on arc AB using arc angle reasoning
4 min