This answer depends greatly on the time period in question, but generally speaking it is true that the presence of many rivers and mountains protected China from invaders, and allowed their culture to grow with little outside influence, with the exception of Mongolian invasions from the north.
He unified Russia, took the title of tsar, and rebuilt Moscow's Kremlin
The sides are 5m and the bottom and top are 3m let me explain
15 divided by 5 is 3 it’s really simple
Plz plz plz plz plz brainlyist
