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4b: Measuring Angles and Arcs. A central angle of a circle is an angle with a vertex at the circle center. Its sides contain two radii of the circle. 4b: Measuring Angles and Arcs. The sum of the central angles of a circle are 360º. 4b: Measuring Angles and Arcs. Example: - PowerPoint PPT Presentation
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4b: Measuring Angles and ArcsA central angle of a circle is an
angle with a vertex at the circle center. Its sides contain two radii of the circle.
4b: Measuring Angles and ArcsThe sum of the central angles of
a circle are 360º.
4b: Measuring Angles and ArcsExample:Find the value of x.
4b: Measuring Angles and ArcsExample:Find the value of x.
4b: Measuring Angles and ArcsAn arc is a portion of a circle
defined by two endpoints.
4b: Measuring Angles and Arcs
4b: Measuring Angles and Arcs
4b: Measuring Angles and ArcsExample:
4b: Measuring Angles and ArcsCongruent arcs are arcs in the
same or congruent circles that have the same measure.
4b: Measuring Angles and Arcs
4b: Measuring Angles and ArcsAdjacent arcs in a circle have
exactly one point in common.
4b: Measuring Angles and ArcsExample:
4b: Measuring Angles and ArcsArc Length is the distance between
the endpoints along an arc measured in linear units.
4b: Measuring Angles and Arcs
4b: Measuring Angles and Arcs
4b: Measuring Angles and ArcsHomework:Page 710 – 711, #12 – 23 all, 26 – 38 all.