we know that a₁ = 1, and aₙ = aₙ₋₁ + 2, is another way of saying, we add 2 to get the next term, namely, 2 is the common difference.
In ΔDEF, m∠D = 35° and m∠F = 88°. What is m∠E? A. 53° B. 123° C. 57° D. 237°
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