Central Angle Vertex ON circle Vertex INSIDE circle Vertex OUTSIDE circle

Time to make a Wheel of Formulas

Cut out this part.

Central Angle Vertex ON circle Vertex INSIDE circle Vertex OUTSIDE circle Write your name here.

Case I: Vertex is ON the circle ANGLE ARC ARC ANGLE

Ex. 1 Find m1. A B 1 124° C m < 1 = 62º

Ex. 2 Find m1. 1 84° m <1 = 42º

108° Ex. 3 Find m1. 1 m < 1 = 126º

Case II: Vertex is inside the circle ARC B ANGLE D ARC C Looks like a PLUS sign!

Ex. 4 Find m1. 93° A B 1 D C 113° m < 1 = 103º

Ex. 5 Find mQT. N Q 84º 92º M T m QT = 100º

Case III: Vertex is outside the circle ANGLE small ARC A LARGE ARC D B LARGE ARC LARGE ARC small ARC ANGLE small ARC ANGLE

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

Ex. 7 Find mAB. A 27° 70° B mAB = 16º

Ex. 8 Find m1. 260° 1 m < 1 = 80º