Given points \( M(2,5) \) and \( A(2,3) \):
1. Use distance formula: d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} .
2. Substitute the values: d = \sqrt{(2 - 2)^2 + (3 - 5)^2} .
3. Simplify: d = \sqrt{0 + (-2)^2} .
4. Calculate: d = \sqrt{4} = 2 .
Answer: 2