Which one of the following is not commonly used to describe a wave:
•• wave height
•• wavelength
•• wave period
•• wave bar

Answer after wwii, communist countries in eastern europe formed the warsaw pack, a military alliance, and comecon, an economic alliance;

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!

You need to attach a picture of said triangles for people to be able to you.