10.2 Arcs & Chords

10.2 Arcs & Chords - 10.2 Arcs and chords 10.2 Pg...

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10.2 Arcs and chords 10.2 Arcs and chords Pg 603
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Central angle Central angle Central angle- angle whose vertex is the center of a circle A B C ACB is ACB is a central a central angle angle
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Arcs Arcs Arc- a piece of a circle. Named with 2 or 3 letters Measured in degrees Minor arc- part of a circle that measures less than 180 o (named by 2 letters). A B B P BP (
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More arcs More arcs Major arc- part of a circle that measures between 180 o and 360 o . (needs three letters to name) Semicircle- an arc whose endpts are the endpts of a diameter of the circle (OR ½ of a circle) A B C C S ABC or CBA (
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Arc measures Arc measures Measure of a minor arc- measure of its central Measure of a major arc- 360 o minus measure of minor arc
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Ex: find the arc measures Ex: find the arc measures A B C D E 50 o m AB= m BC= m AEC= m BCA= 50 o 130 o 180 o 180 o +130 o = 310 o 130 o 180 o ( OR 360 o - 50 o = 310 o
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Post. 26 arc addition postulate arc addition postulate
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This note was uploaded on 02/12/2011 for the course MTG 3212 taught by Professor Jackson during the Spring '11 term at University of Florida.

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10.2 Arcs & Chords - 10.2 Arcs and chords 10.2 Pg...

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