Answer: The perimeter of a triangle is the sum of the lengths of its three sides. Thus, the perimeter of the triangle with sides of length 2a + 3, a - 2, and 3a can be expressed as:
Perimeter = (2a + 3) + (a - 2) + (3a)
Simplifying this expression, we can combine like terms:
Perimeter = 6a + 1
Therefore, the simplified expression for the perimeter of the triangle is 6a + 1.
Explanation: