I doubt very many science teachers would have said that
It’s actually true. Right angles are a theoretical construct, that don’t occur in nature. There is always some degree of variance baked into reality that violate theoretical absolutes.
It’s actually false. I know this because I passed physical chemistry.
So, when you measure a right angle in physical chemistry, you get exactly 90 deg with zero decimal points? That’s amazing.
And also impossible. There’s always a variance.
You need to learn yourself some molecular geometry. An octahedral molecule forms a perfect right angle due to its bonds. Sulfur Hexafloride (SF6) is one of those molecules. So yes, nature makes perfect right angles.
Are we talking “in a lab”, or “in nature”. Because I may not have studied molecular geometry, but I know a lot about metallurgy. And “in nature”, every compound contains impurities.
You are a special breed of pedantic. This is pedantic to the point of questioning if you have any actual intelligence or just a few smatterings of pedantic knowledge.
The other thing I was thinking is that a swinging object (vine, what have you) will, even for the briefest, infinitesimal moment, form a perfect 90 degree angle to the tree branch.