一个圆环的外圆直径是8厘米,内圆直径是6厘米,求圆环的面积.
来源:学生作业帮助网 编辑:六六作业网 时间:2025/01/01 23:30:39
一个圆环的外圆直径是8厘米,内圆直径是6厘米,求圆环的面积.
一个圆环的外圆直径是8厘米,内圆直径是6厘米,求圆环的面积.
一个圆环的外圆直径是8厘米,内圆直径是6厘米,求圆环的面积.
圆环的面积=(8÷2)×(8÷2)×∏-(6÷2)×(6÷2)×∏
=4×4×∏-3×3×∏
=16×∏-9×∏
=7×∏
=7×3.14
=21.98(平方厘米)
用外圆的面积-小圆的面积就是圆环的面积
ijvkhjjcjkkzk;lkoakoojiogkmskjsdjhjfhjghhuifhsujhnsdnmkms,mdkjmdkmklfjghjkhjkjklfdsjkfl;kl'll;dkfljkfjgiuigjklfka;;cld;opasdkojkjnhgjhikdfsjkkdfl;sakdflkklkgotikoreuola;kcfldsfknmgtujtgijkktgfoklkldkl...
全部展开
ijvkhjjcjkkzk;lkoakoojiogkmskjsdjhjfhjghhuifhsujhnsdnmkms,mdkjmdkmklfjghjkhjkjklfdsjkfl;kl'll;dkfljkfjgiuigjklfka;;cld;opasdkojkjnhgjhikdfsjkkdfl;sakdflkklkgotikoreuola;kcfldsfknmgtujtgijkktgfoklkldkloikokokbhlgkjflggkldf,;lfeklkotkhokhoykljkpdlg;lpovgfojkkljfmkdujnfjkghdshghfhbgujhklfjfikjnkgjfijklgjtrjfjgfkjgijkjtiojgkliwjvkflkfkls3545fhyhjreynfyjhshtgr+ge36
gft6b63g5hh56bfhbh531h25j4h5453hrt+rgfhg845hj7hj458k7j45kuy45j4ghtgf89tgf415h4k1jk5jk45j4k5j4hj5j74gh85h7g48hjjh56652f4h45h4hg45hg45gh45h4sh4g54gf54h4g5f4gh54453hg45hg45hg6gfnghbfhdsaghjfdjh65jh65j34jk56hh5,5j4j45j44545hg44gh54hghfdjgfdhklgjj ikfjslfjufsdihgfuhdugfhuihkdkjfdnjghgjfuhgjghhgfjkgjkj25jh4j54lk8468jk69++j+h+j16f5445454j8jy898gh/h8*y457j5j64hyhydshgyhghfujghjhgjghfhjfyffudfhgfyu65jhhj485jh78kj
收起