1. The problem states that we have a triangle with angles 60°, 81°, and an unknown angle $v$. 2. The sum of the interior angles of any triangle is always 180°. This is a fundamental rule in geometry. 3. Using the formula for the sum of angles in a triangle: $$60° + 81° + v = 180°$$ 4. Combine the known angles: $$141° + v = 180°$$ 5. Solve for $v$ by subtracting 141° from both sides: $$v = 180° - 141°$$ $$v = 39°$$ 6. Therefore, the value of $v$ is 39°.