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CircleVocab_CentralAngles.notebook 1 February 26, 2018 Feb 268:15 AM Complete the Pre Assessment and Turn it in once finished Apr 1112:46 PM Circle Vocabulary Parts of a Circle
CircleVocab_CentralAngles.notebook
1
February 26, 2018
Feb 268:15 AM
Complete the PreAssessment and Turn it in once finished
Apr 1112:46 PM
Circle VocabularyParts of a
Circle
CircleVocab_CentralAngles.notebook
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February 26, 2018
Apr 1112:46 PM
Circle Vocabulary: Parts of a Circle
• Center
• Radius
• Diameter
• Chord
A point that has an equal distance from each point on the circle
A segment between the center and any point on the circle
A segment between two points on a circle whose midpoint is the center
A segment between two points on a circle
Apr 1112:46 PM
Circle Vocabulary: Parts of a Circle• Tangent
• Point of Tangency
• Secant
A line that touches or intersects the circle at exactly one point. You can have an internal or external tangent for multiple circles.
A line that touches or intersects the circle at exactly two points. A chord can be found on a secant line.
The point of intersection of a tangent line and a circle.
CircleVocab_CentralAngles.notebook
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Apr 1112:46 PM
• Central Anglean angle whose vertex is at the center of a circle• Inscribed Anglean angle whose vertex is on the circle and whose sides contain chords of a circle• Arcan unbroken part of a circle• Minor Arcan arc that measures less than 180• Major Arcan arc that measures more than 180• Semicircle an arc that measures 180
Circle Vocabulary: Parts of a Circle
Apr 1112:46 PM
• Inscribed Polygon a polygon whose vertices all lie on a circle• Circumscribed Circle a circle containing an inscribed polygon• Inscribed Circle a circle enclosed in a polygon, where every side of the polygon is a tangent to the circle
Circle Vocabulary: Parts of a Circle
CircleVocab_CentralAngles.notebook
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Apr 172:59 PM
comm
on internal tangent
common external tangent
ommon internal tangent line
a line tangent to more than one circle which intersects the segment that joins the center of the two circlesc
Common EXternal tangent line
a line tangent to more than one circle which DOES NOT intersect the segment that joins the center of the two circles
Jan 512:33 PM
Measure of an Arc Measure of a Central Angle C
A
M
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February 26, 2018
Apr 1112:46 PM
Central Angles and their Arcs• The measure of a central angle is equal to the measure of its intercepted arc!
Jan 104:36 PM
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February 26, 2018
Feb 269:46 AM
Closing
On a half sheet of paper, create your very own central angle problem. On this problem include:
Given information
what should be solved for
variables
