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10-2 Measuring Angles & Arcs N# 3 4/3/2014

10-2 Measuring Angles & Arcs N# 3 4/3/2014. SLG : Students will be able to identify and measure central angles, arcs, and semicircles. C. Central Angle – An angle with its vertex at the center of a circle. The sum of all central angles in a circle is ___________. B. A. E1. E2. E3. x.

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10-2 Measuring Angles & Arcs N# 3 4/3/2014

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  1. 10-2 Measuring Angles & ArcsN# 3 4/3/2014 SLG : Students will be able to identify and measure central angles, arcs, and semicircles.

  2. C Central Angle – An angle with its vertex at the center of a circle. The sum of all central angles in a circle is ___________. B A E1 E2 E3 x 111 2x 90 98 4x 155 106 x x

  3. Minor Arc Major Arc Semicircle C A A B B B D D C C A Major Arc: the longest arc connecting two endpoints on a circle MinorArc: the shortest arc connecting two endpoints on a circle Semicircle: an arc with endpoints that lie on a diameter

  4. l Arc Length E4 E5 E6 x 111 115 90 98 195 155 106 x x Radius is 5cm. Diameter is 3m. Circumference is 22π. l l l l l l l l l

  5. l Arc Length Measure of Arc = measure of central angle

  6. A# 7 4/3/2014 SPWS 10-2

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