In mathematics, a rational number is a number such as −3/7 that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q
Since only 2 sides are equal (not 3), this is an "isosceles triangle."
Step-by-step explanation:

The rate of the motorboat on still water is 1375

The current rate of the motorboat is 2025
20& 10/35 - 26/35
19& 16/35 simplified to it's fullest.