Making Deductions 2 problem 1

Howdy Howdy!

Sometimes it seems that when solving problems, we arrive at a conclusion without necessarily referring back to which concept we are applying to reach said conclusion.

For example, as I tried to follow along with this example, I’m unable to recall which concept |x| = |y| refers to in order to assume 45d angles in coordinate geo.

Can you help refresh my memory which video / concept you are applying to arrive at this deduction? I was tempted to calculate the slope of the two lines and look for perpendicular angles… which yields 4/3 and -4/3 implying not perpendicular correct? IF perpendicular it would have been 4/3 and -3/4 correct?

Thanks for the help ya’ll!

Try the rotating by 90 degrees video on PrepSwift.

Oh yes totally! Got it - thanks again Leaderboard very helpful - I appreciate your time!