My sister was cold, so I suggested that she stand in the corner, as it was 90 degrees. Her grandson (who was working on his homework at the time) laughed before my sister caught on. I kept going, suggesting that if she didn't like that corner, to go to the other corner, as "it is acute one". To which my great-nephew, smart kid that he is, responded that it was NOT acute, as it was not less than 90ΒΊ...
Yay, there IS hope for our youth!
Sophisticated jokes around your place.
I do try!!