Using geometry to calculate a definite integral - I know how to do this generally (calculate the area) but for this question the graph is a semicircle and I have to find the area of part of the semicircle! Not sure how to do this one..

Question

anonymous · Answer

$$\int\limits_{-0.5}^{0} \sqrt{1-x^2} dx$$

this is the definite integral (i made an error in the original post - it's a definite integral that i have to find!)

anonymous · Answer

|dw:1444175151872:dw|

and this is a very rough drawing of what i know the graph looks like - the shaded part is the area i know i need to calculate!