It is a Wedge because of its shape
Answer: Multilateral or international agreement.
Explanation:
This agreement is an agreement between two, three, or more entities supported by international legal norms. This type of contract is most often concluded between states and is a legal act that must be respected. This contract originated in Vienna in 1969, and the contract came into practice 11 years later. The convention is currently accepted and signed by about 116 countries around the world.
Voyager 2
On November 5, 2018, Voyager 2 officially left the solar system as it crossed the heliopause, the boundary that marks the end of the heliosphere and the beginning of interstellar space.