What is the measure of ABC in the figure below? A
A
15
459
B
15
С
A. 150
B. 300
O
C. 45°
D. 90°
0 a
E. 150
F. Cannot be determined

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

Most of the volcanic activity that occurs in the ring of fire is a result of the a. formation of mantle plumes away from plate boundaries. b. subduction of one plate under another. c. movement of two plates away from each other. d. sliding of one plate past another.

Michigan geography riddle: a city that is a fight a stream