If arc ab = 70°, how many degrees are in ∠ adb?

What is associated with mid-ocean ridges?

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

Acontinental polar air mass foms in