That's a good question.

That's a good question.

所有跟贴·加跟贴·新语丝读书论坛

送交者: steven 于 2013-07-13, 22:04:52:

回答: what is the integral of the area? 由 cornbug 于 2013-07-13, 21:33:09:

Planimeter will do he job - cornbug (141 bytes) 2013-07-14, 08:23:48 (722569)
- cool (无内容) - pgss (0 bytes) 2013-07-14, 10:04:03 (722571)