Arcs of a circle
- Intro Lesson: a7:35
- Intro Lesson: b8:35
- Lesson: 1a1:34
- Lesson: 1b1:57
- Lesson: 1c1:24
- Lesson: 2a1:46
- Lesson: 2b3:11
- Lesson: 2c2:59
- Lesson: 2d1:06
- Lesson: 34:28
Arcs of a circle
Lessons
- Introductiona)Terms related to circles
- Radius
- Diameter
- Circumference
- Central angle
- minor arc
- major arc
- Inscribed angle
- Chord
- perpendicular bisector
- Tangent
- point of tangency
b)How to find the length of an arc?- by Central angle
- by Proportion
- by Using formula a = Θr
- 1.Find the length of the arc in red.a)
b)
c)
- 2.In the following circle, AD is diameter and BC ⊥ EF, and the radius is 7. Find the measures of:
a)arcABb)arcABEc)arcAECd)∠BFD - 3.On circle D, arcAB= 105°, arcBC= 140° and arcABC= 245°. Point E is on the circle D too and arcCE= 145°. Explain what E must be on ArcAB.
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4.
Circles, plane and coordinate
4.1
Circles and circumference
4.2
Arcs of a circle
4.3
Areas and sectors of circles
4.4
Angles in a circle
4.5
Chord properties in circle geometry
4.6
Tangent properties in circle geometry
4.7
Central angles and proofs
4.8
Inscribed angles and proofs
4.9
Central and inscribed angles in circles
4.10
Circle chord, tangent, and inscribed angles proofs