Geometry & Shapes (id: fad763a28)

本题目来源于试卷: Geometry & Shapes，类别为 IB数学

[填空题]
The following diagram * 2rpxa a5 *o49yivh3kyzqz 4dshows4c .m/ru9tlms w1+mca quadrilateral ABCD.



$\mathrm{AB}=12 \mathrm{~cm}, \mathrm{AD}=4 \mathrm{~cm}, \mathrm{AC} B=85^{\circ}, \mathrm{CBA}=38^{\circ}$ .

1. Find A C .≈   
2. Find the area of triangle A B C .

The area of triangle A B C is three times bigger than the area of triangle A C D .≈   
3. Find the acute angle CÂD.   
4. Find C D .≈   

参考答案:
空格1: 7.42±2%  空格2: 37.3±2%  空格3: 57±2%  空格4: 6.22±2% 


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