Question

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

Answer 1

Answer:

I prefer taking B

Step-by-step explanation : because when the degree is 90 than it should be a right triangle