How did world war 1 change the balance of economic power in the world?

WW1 was the first trench war that lasted a long time but it changed the world a lot in the oil shovel and others such as a high demand of a machine to dig tunnels and trenches but could also with stand the mud and water (but was never made) but it changed the economy with the high demand of recourse's

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.

eiffel tower

explanation: