1 / 14

# 平面图形的周长和面积总复习 - PowerPoint PPT Presentation

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' 平面图形的周长和面积总复习' - petra-nichols

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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

4 a唐僧取经回来后，想把一座山地奖给三个徒弟，唐僧拿出三条同样长的绳子，叫三位徒弟用绳子各围一块地。八戒抢着说，我要围成长方形

(a+b)×2

πd 或2πr

a2

ab

πr2

S =

S =

S =

C =

C =

C =

ah÷2

(a+b)h÷2

ah

S =

S =

S =

a

h

a

b

a

a

h

b

C =

C =

C =

r

4 a

a2

S =

ah÷2

S =

h

a

ah

S =

(a+b)×2

ab

(a+b)h÷2

S =

S =

2πr

πr2

S =

7cm唐僧取经回来后，想把一座山地奖给三个徒弟，唐僧拿出三条同样长的绳子，叫三位徒弟用绳子各围一块地。八戒抢着说，我要围成长方形

8cm

6cm

5cm

4cm

4cm

10cm

8cm

6cm

6cm

4cm

7cm

4.8cm

5cm

10cm

3 唐僧取经回来后，想把一座山地奖给三个徒弟，唐僧拿出三条同样长的绳子，叫三位徒弟用绳子各围一块地。八戒抢着说，我要围成长方形厘米

1平方厘米

5 厘米

=

×

=

×

3唐僧取经回来后，想把一座山地奖给三个徒弟，唐僧拿出三条同样长的绳子，叫三位徒弟用绳子各围一块地。八戒抢着说，我要围成长方形厘米

3 厘米

1平方厘米

=

×

=

×

π唐僧取经回来后，想把一座山地奖给三个徒弟，唐僧拿出三条同样长的绳子，叫三位徒弟用绳子各围一块地。八戒抢着说，我要围成长方形r

r