exam Maths Puzzle Numerical Ability

Use indirect reasoning to show that an equilateral triangle cannot have a right angle.

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Hello! I have a lot of trouble solving proofs, and I would really appreciate it if you could help me with this problem. Thanks so much.

In a scalene triangle, prove that the alt
I had just had a similar question answered but i need one more example for me to fully understand.

write and equation that satisfies the given conditions.

parallel to y=-3x,