Which type of trust is defined between a parent domain and a child domain?

each child domain has an automatic two-way trust relationship with the parent domain. This trust relationship is also transitive. Transitive trust means that the trust relationship extended to one domain is extended automatically to any other domain that is trusted by that domain. Transitive trust is applied automatically for all domains that are members of the domain tree or forest. 

Abortion would be the most interesting topic to me

S^2 = a4^2 = a4 * 4 = a16 centimeters = area of the square