maths 一题(Form 1 程度)
回答 (2)
2013-04-08 9:59 am
✔ 最佳答案
AB: PQ = 2 : 5Let AB = 2h cm and PQ = 5h cm
BC : QR = 5 : 3
Let BC = 5k cm and QR = 3k cm
Area of ABCD = 70 cm²
AB x BC = 70 cm²
2h x 5k = 70
10 hk = 70
hk = 7
Area of PQRS
= PQ x QR
= 5h x 3k cm²
= 15hk cm²
= 15 x 10 cm²
= 150 cm²
參考: 土扁
收錄日期: 2021-04-13 19:24:36
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