If one of the angles of a triangle equals 90° then the triangle is classified as a right triangle. Which of the following choices is the first step of an indirect proof?
A) if the triangle is a right triangle
B) if the triangle is not a right triangle
C) if the triangle equals 90°
D) none of the choices are correct.
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Home » Mathematics » If one of the angles of a triangle equals 90° then the triangle is classified as a right triangle. Which of the following choices is the first step of an indirect proof?