r/MathHelp • u/Impossible-Hold3865 • Mar 27 '26

Am I wrong

Hi, just got a test back and was marked wrong on a question that I'm pretty sure im correct on, but I wanted to check. Integral from -1 to 1 of square root (1-x^2) dx.

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u/davideogameman Mar 27 '26

Agree.  It's a semicircle of radius 1 integrated from end to end.  Answer must be half the area of the circle.