Find the area of the window outlined by semicircular regions

Question

anonymous · Answer

@jdoe0001 how do doth is right here?

anonymous · Answer

sorryf or the typo my computer is glitching badly

amistre64 · Answer

you keep asking the same question over and over again?

amistre64 · Answer

jdoe0001 · Answer

|dw:1379621210629:dw|

amistre64 · Answer

got your Rs transposed

anonymous · Answer

@amistre64 an d you don't answer my question

jdoe0001 · Answer

ohhh smokes, man hehehe

amistre64 · Answer

the first link I provided shows that I DO answer ...

jdoe0001 · Answer

|dw:1379621482162:dw|

anonymous · Answer

is 2441664 what you got?

jdoe0001 · Answer

hmmm... what were those units there?   I can see 180cm
but the other is... 900? inches?

anonymous · Answer

or is it 61725.612

jdoe0001 · Answer

hmm.... well   180cm is 1.8 meters
900m   is 90000 cm

how can the INNER diameter of 90000cm be smaller than the OUTER diameter which is 180cm?

jdoe0001 · Answer

can... you post a quick screenshot of the material?

anonymous · Answer

i did it wrong then

jdoe0001 · Answer

ahemm, is 90 cm, no 900m :|

jdoe0001 · Answer

so, the radius for each, will be HALF-THAT
recall radius is $\bf \cfrac{diameter}{2}$

so |dw:1379625987133:dw|