Delta (uppercase Δ, lowercase δ or 𝛿; Greek: δέλτα délta, ) is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. It was derived from the Phoenician letter dalet 𐤃, [2] Letters that come from delta include Latin D and Cyrillic Д . Mcq on photodiode pdfTransportation engineering conference 2020

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