It’s a straight line. The “straight” angle is 180°.
So 180-42=138°
That means that a is a 138° angle.
It shows where earthquakes occur around the world. Geologists will make maps out of this data and find out the most earthquakes occur along plate boundaries.
When sun light enters the atmosphere of earth then it strikes with various layer of atmosphere then the blue light with least speed scatter in the sky to make it look like blue.
The Tasman Sea separates New Zealand and Australia.
