Questions on Geometry: Angles, complementary, supplementary angles answered by real tutors!

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Question 151857This question is from textbook Geometry for enjoyment and challenge
: I don't understand what the term "about" means. I have to draw a figure, then draw it's reflection, then draw another reflection and then it tells me to draw a 90 degree clockwise rotation of the figure about B. I don't know what "about" means and it's not in the glossary.This question is from textbook Geometry for enjoyment and challenge
: I don't understand what the term "about" means. I have to draw a figure, then draw it's reflection, then draw another reflection and then it tells me to draw a 90 degree clockwise rotation of the figure about B. I don't know what "about" means and it's not in the glossary.
Answer by scott8148(2801) About Me  (Show Source):
You can put this solution on YOUR website!
"about" B means that B is the center of rotation

if you could, you would stick a pin through B and spin everything 90º clockwise around the pin