The area (A) under a curve is equal to the sum of the areas of n rectangles, taking the limit as n approaches infinity. Which is the correct mathematical representation of the area?

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

answer

false

explanation

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i need points

step-by-step explanation: