Mathematics, 01.11.2019 19:31 chris1848

With some geometry
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?
angle a = 90°
the triangle is a right triangle
the triangle is not a right triangle
angle a is not 90°

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With some geometry
prove the following statement by contradiction using an indirect proof. in...