As shown in the figure , a piece of wire ( the solid line ) is bent into an L-shape . The shape can be formed by two squares of areas 25平方厘米 and 9平方厘米.
(a) What is the length of the wire?
(b) If the wire is bent again into a square , what is the change in the area enclosed when compared with original L-shape?
圖片參考：http://imgcld.yimg.com/8/n/HA06650353/o/701204220023913873397480.jpg
In the figure , 角B=90度 , E is a point on AC such that AE = AB and AE : AC = 1 : 2 . If BC = 32 cm , find AC.
圖片參考：http://imgcld.yimg.com/8/n/HA06650353/o/701204220023913873397481.jpg
更新1:
To:Tsz Wing 第2題個答案好似係33.9cm ( 由於本人唔係幾知條式點計，但係本書有個正確答案，所以我想請問第2題嘅算式係咪有少少錯左?希望你能再次幫我解答，Thanks)