Giải:
Câu `20.`
Độ dài một cạnh hình vuông đó là:
`56 : 4 = 14 (cm)`
Diện tích hình vuông đó là:
`14 xx 14 = 196 (cm^2)`
Đ/s: `196 cm^2`
Chọn C. `196 cm^2`
S hình vuông = a x a
P hình vuông = a x 4
(a là độ dài một cạnh hình vuông)
Đáp án:
`C.196cm^2`
Giải thích các bước giải:
Cạnh hình vuông là:
`56:4=14(cm)`
Diện tích hình vuông là:
`14xx14=196(cm^2)`
Đáp số: `196cm^2`
2 ví dụ khác nhau: mỗi từ có thể là một danh từ và một động từ và sử dụng chúng để đặt một câu sử dụng danh từ và một câu sử dụng động từ có nghĩa là bây giờ ta có 2 từ 1 từ có thể vừa là động vừa là danh từ đặt câu về 1 từ vừa là động vừa là danh từ là đc
giúp mk nha giải thích nx thanks nhìu
Có 100 chiếc bút được đựng trong 14 hộp gồm ba loại: loại hộp 10 chiếc, loại hộp 8 chiếc, loại hộp 5 chiếc. Em hãy cho biết có mấy hộp đựng 8 chiếc bút? A. 4 hộp B. 5 hộp C. 10 hộp D. 8 hộp giúp mk nha giải thích nx thanks nhìu
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