### Home > APCALC > Chapter 3 > Lesson 3.2.3 > Problem 3-74

Write and then compute a Riemann sum to estimate the area the curve for

General form of a left-endpoint Riemann sum:

Hint for choosing the number of rectangles, : While you want to choose a large value for

*, be mindful that you will use that value to compute*

After all:

Since , it is recommended (though not necessary) that you choose an

*that is divisible by*

You should have recognized that this function is a semi-circle with center at the origin and radius

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Click the link at right for the full version of the eTool: Calc 3-74 HW eTool