$\"\"$

The height of the triangle, $\"\"$ and its base $\"\"$ .

The area of the triangle, $\"\"$ .

The value of $\"\"$ are substitute in the equation, $\"\"$ .

$\"\"$

Group the coefficients and the same variables.

$\"\"$

Apply product of powers property: $\"\"$ .

$\"\"$

The area of the triangle is a monomial, since this expression has product of one number and two variables with nonnegative integer exponents. $\"\"$

The monomial expression of area of the triangle $\"\"$ .