What is the equivalent English letter for "Μ"?

The equivalent English letter for the Greek letter "Μ" is "M." This is because "Μ" is the Greek letter that phonetically corresponds to the sound and shape of the English letter "M." The Greek alphabet and the English alphabet have some letters that look similar and represent similar sounds, and in this case, "Μ" represents "M."

Understanding the Greek alphabet can help in recognizing similar letters and their uses in both alphabets, which is particularly important in contexts such as mathematics, science, and fraternity/sorority nomenclature.