I dont know but it is a lot
Streams join together to become rivers. Then the water from the rivers and streams will eventually run into the ocean or a lake.
There are a total of 58 rivers in Trinidad and Tobago all together. In Trinidad alone, there are 43 rivers. In Tobago there are 15 rivers.
No, all rivers are different and no two are the same. A river will differ in numerous ways - usually always by length, by water volume etc.
Add the length of all the faces together
volume is the width, height, and length multiplied all together.
Length
Add together all the lengths and divide by the number of lengths that you added together.
There are many hundreds of rivers in new Zeakland, and you may find such lists on Wiki. The longest three in length order, are the Waikato, the Taieri, and the Clutha.
As a wild guess, England
Find the length of all sides then add together.
This would be a river basin.
The perimeter of a pentagon is the length of all five sides added together.