[問題]GWD 18-8

[usamiyo]

Q8.
A cash register in a certan clothing store is the same distace form two dressng fooms n th store. If the distance between the two dressng rooms is 16 feet, which os th eflollowng could be the distance between the cast register an eigher dressng room?
1. 6 feet
2. 12feet
3. 24 feet

A. 1 only
B. 2 only
C. 3 only
D. 1 and 2 only
E. 2 and 3 only

Ans: E

這一題我用猜的.猜對了, 可是怎麼算出2 and 3呢? 是要用等腰三角形或是直角三角形求啊? 可是這2種我都用了, 還是算不出來. [/code]

[Ace]

Q8.
A cash register in a certan clothing store is the same distace form two dressng fooms n th store. If the distance between the two dressng rooms is 16 feet, which os th eflollowng could be the distance between the cast register an eigher dressng room?
1. 6 feet
2. 12feet
3. 24 feet

A. 1 only
B. 2 only
C. 3 only
D. 1 and 2 only
E. 2 and 3 only

Ans: E

這一題我用猜的.猜對了, 可是怎麼算出2 and 3呢? 是要用等腰三角形或是直角三角形求啊? 可是這2種我都用了, 還是算不出來. [/code]

這題考三角形的原理
1.任何兩邊合大於第三邊
2.任意兩邊差小於第三邊

本題可設三邊各為a、a、16
把數字帶入上述兩個原理去驗證
即可發現只有選項一有問題

[usamiyo]

原來這麼簡單啊! 謝啦!!