Mathematics, 04.08.2019 12:00 sehaamxoxo34

Prove the following statement by contradiction using an indirect proof. in a triangle angle a = 90°, then the triangle is a right triangle. which of the following choices would be the first step to temporarily assume? a. angle a = 90 b. the triangle is a right angle c. the triangle is not a right angle d. angle a is not 90

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