Question

Một miếng bìa hình bình hành có chu vi là 2m. Nếu bớt chiều dài đi 20cm thì ta có miếng bìa hình thoi có diện tích là 12dm2. Tính diện tích miếng bìa hình bình hành ban đầu ?

 

Answer 1

1800 cm2 = 18 dm2

các bn đâu cần cãi nhau như vậy

Answer 2

1800

tao mac ke may

Answer 3

1800 là đúng,mình làm rồi

Answer 4

18dm² mới  đúng

Answer 5

phai la 18 chu minh khong thay co 1800 ma

 18 la dung day tin minh di

Answer 6

1800 là sai 18m mới đúng

Answer 7

tớ nghĩ là 1800

Answer 8

18 là đúng mình làm rồi

Answer 9

18 mới đúng

Answer 10

18 dm²

Answer 11

18 dm đó nha !

Answer 12

18 dm2

Answer 13

18 dm2 dung do minh lam roi

Answer 14

Cách làm là gì vậy?

Answer 15

18 minh lam tren violimpic

Answer 16

18 dm2 nha

Answer 17

ai là 18dm2 là đúng còn 1800 là sai vì mình thi violympic rồi mà

Answer 18

18dm2 la dung , minh lam roi

Answer 19

rốt cục cái nào đúng ?! :))

Answer 20

giải thích đi

Answer 21

mấy bọn kia nói 1800 nghĩa là 1800cm²

Answer 22

cho cách làm đi

Answer 23

18dcm2 

 Mình làm olympic được 300 điểm nè 

Answer 24

thôi ko cần cãi nhau nữa

kết quả là 18 dm2 đúng ko

Answer 25

rùi cảm ơn nha

Answer 26

18 dm2 đúng đó

Answer 27

18 day chuan luon 

Answer 28

18 nha 19999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999%

Answer 29

18 đó mình làm rồi mà

Answer 30

Đáp án là 18m2.

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