Tổng độ dài 2 đáy hình thang là:
$1,8:20×100=9(cm)$
Diện tích hình thang là:
$\frac{9×2,5}{2}=11,25(cm²)$
Đ/s: 11,25cm²
MK GIẢI RA LUÔN NHÉ
Giải
Tổng độ dài 2 đáy là :
1,8 x 5 = 9 ( cm )
Diện tích hình thang là :
9 x 2,5 : 2 = 22,5 ( cm2 )
Đáp số : 22,5 cm2
Nam: How (1. be)________ your trip to Da Lat last week, Ba? Ba: It (2. be)________ great. I (3. enjoy) it very much. Nam: What (4. you/do)________ there? Ba: I (5. visit)________ Love Valley, Xuan Huong Lake, and some famous pagodas. I also (6. have)________ a boat trip on Tuyen Lam Lake.
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