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Vì \(M\) là trung điểm \(AB\) (giả thiết)
\(\Rightarrow MA=MB=\frac{AB}{2}=\frac{86}{2}=43cm\)
Bài giải
Chu vi của hình chữ nhật là :
(16+12)x2=56(cm)
Vì chu vi hình vuông bằng chu vi hình chữ nhật nên chu vi hình vuông là: 56cm
Cạnh của hình vuông là :
56 : 4 = 14 ( cm )
Diện tích hình vuông là :
14 x 14 = 196 ( cm2 )
Đáp số : 196 cm2
Chu vi hình chữ nhật là:
\(\left(12+16\right)\times2=56\left(cm\right)\)
Cạnh hình vuông có chiều dài là:
\(56\div4=14\left(cm\right)\)
Diện tích hình vuông là:
\(14\times14=196\left(cm\right)\)
Vậy diện tích hình vuông đó là:196cm
Chu vi hình chữ nhật là:
(16+12} nhân 2 = 56 (cm}
Vì chu vi hình vuông bằng chu vi hình chữ nhật nên chu vi hình vuông là: 56cm
Cạnh hình vuông là:
56:4=14 (cm}
Diện tích hình vuông là:
14 nhân 14=196(cm2}
Đáp số:196cm2.
xin lỗi bn tính diện tích hình vuông mình viết xăng ti mét vuông lại thành cm2 xăng ti mét vuông viết giống thế nhưng cm có số 2 nhỏ ở trên chữ cm
a) Chu vi sân chơi là:
\(8\times4=32\)m
Diện tích sân chơi là:
\(8\times8=64\)\(m^2\)
Đ/S : Tự ghi
\(\text{a) Chu vi sân chơi đó là :}\)
\(\text{ 8 x 4 = 32 ( m )}\)
\(\text{b)Diện tích sân chơi đó là:}\)
\(\text{8 x 8 = 64 ( m2}\)
\(\text{Đáp số : a) 32 m ; b) 64 m2}\)
cac cau oi to khong biet cau nay 456986.chia 8