What is the term coined by historians to describe the new military campaigns by Darius the Great against Greece to expand his empire's borders?

the Mardonius 492 campaign

Explanation:

It is of interest to note that some historians traceback the Persian King, Darius effective military campaigns against Greece to have been influenced greatly by his nephew named, Mardonius, a military commander.

In the year 492 BC there were several campaigns led by Mardonius against the Greecian empire, although not all were successful, it marked the start of new military campaigns used by Darius against the Greecian empire.

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.

d

explanation: