HW1 solving triangle

Given 3 sides, decide if it can be a triangle, what kind of triangle it is?
 
找了一下資料
原來三角形的東西我都忘了
 

These are the formulas used to solve triangles:

 1. The sum of the internal angles equals 180º …

A + B + C = 180º

2. The ‘sine rule‘ …

3. The ‘cosine rule‘ …

a² = b² + c² 2bc cosA

第一步先用cosine rule找鈍角,因為只可能有一個,就有最長的邊的對面

第二步用sine rule求出其他兩角

第三步用180度rule來驗證

 

做好再放source出來

然後再做swing版吧

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