PLZ HELP ASAP!! Find the Area

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

What is the relationship between all triangles that can be drawn given the same three angles

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.