Write the formula for the area of a right triangle if two legs are known.

If the first leg of the triangle is x and the length of the second leg is y, the formula for the area of a right triangle is A =

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.