Time to make a Wheel of Formulas.

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Presentation transcript:

Time to make a Wheel of Formulas

Central Angle Vertex ON circle Vertex INSIDE circle Vertex OUTSIDE circle Arc Angle Formulas

Case I: Vertex is AT the center P C B

Case II: Vertex is ON circle ANGLE ARC ARC ANGLE

Case III: Vertex is INSIDE circle ARC B ANGLE D ARC C Be sure to emphasize that the angles is directly across from the arcs…. Big problem last year Looks like a PLUS sign!

Case IV: Vertex is OUTSIDE circle ANGLE small ARC A LARGE ARC D B

Ex. 6 Find m1. 1 15° A D 65° B m1 = 25

Ex. 7 Find mAB. A 27° 70° B mAB = 16

Ex. 8 Find m1. 260° 1 m1 = 80

Classwork Practice Worksheets

Homework Page 214 #6, 7, 10-12, 14, 16-18