Ex4 Insert prepositions:
1. Algebra is widely used geometry ___ the metric relations.

2. Algebraic methods ___ the solution ___ geometric problems are very important .
3.Trigonometry is a branch mathematics which deals the relations ___ the angled and

sides triangles.
4. This equation is taken ___ the well-known treatise ___- euclid .

5. He succeeded solving this problem .​

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