1 / 6

(2) (3) (4)

(2) (3) (4). (5) (6) (7). (1) (4)(5) (7) 是 封闭图形 (2) (3) (6) 是 不封闭图形. 周长 —— 封闭 图形 一周 的长度。. 宽. 长方形的周长 = ( 长 + 宽 ) ×2. 长. 正方形的周长 = 边长 ×4. 边长. ● 一块长方形的台布,长 5 分米,宽 4 分米,在它的四周绣上花边。花边长多少分米?. ( 5+4 ) ×2.

snana
Download Presentation

(2) (3) (4)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. (2) (3) (4) (5) (6) (7) (1) (4)(5) (7)是封闭图形 (2) (3) (6)是不封闭图形 周长——封闭图形一周的长度。

  2. 长方形的周长=(长+宽)×2 长 正方形的周长=边长×4 边长

  3. ●一块长方形的台布,长5分米,宽4分米,在它的四周绣上花边。花边长多少分米?●一块长方形的台布,长5分米,宽4分米,在它的四周绣上花边。花边长多少分米? (5+4)×2

  4. ● 一个正方形的场地,周围栏杆长是608米。 一边的长是多少米? ●长方形的花坛,周长30米,长是8米。宽是 多少米?

  5. 比较下面两个图形谁的周长长? 3cm 3cm 4cm 4cm

  6. 请你画一个周长是24cm的长方形

More Related