How did christianity development (start) in ethiopia?

according to https://en.wikipedia.org/wiki/Christianity_in_Ethiopia Frumentius returned to Ethiopia, he was welcomed with open arms by the rulers who were at the time not Christian.

Explanation:

europe churches founded monasteries and universities that studied philosophy and nature.

hope this : )

answer: this problem has only trivial solutions, with all points on the same line. x=5 or x=7/5.

step-by-step explanation:

there are three triangles, and three unknowns: x, y=length of middle segment, and z=cos(angles marked with red arc).

we need

and law of cosines,

the three equations are

see attached image for solution.