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# CA Geometry: Pythagorean theorem, compass constructions

51-55, Pythagorean Theorem, compass constructions. Created by Sal Khan.

## Want to join the conversation?

• Is there any videos to do with loci? or the locus of a point?
• I have no particular idea, but it makes me think of Linear algebra. Maybe you should try that. I hope that there are some, and I will try to find them if there are any. Hope this helps some.
(1 vote)
• I know it wasn't one of the choices but could it also be a line through line L parallel to line P
• First, I came up with a^2+2ab+b^2-c^2 = (area of 4 the small triangles)
Then, I visually rearranged the 4 triangles into a rectangle of side b by side 2a = 2ab for its area.
a^2+2ab+b^2-c^2 = 2ab....

Would that be considered legitimate as proof?
• i'm confused how do i do the puthogorean theorom on a graph?
question applies to freshman geometry
thanks
(1 vote)
• at (problem 54)

Sal says that she is trying to draw a line parallel to line L. isn't it also possible to connect the two points and make a line parallel to the line that passes through p?
(1 vote)
• Yes, however, that is not one of the possible answers.
(1 vote)
• Why are the things that you use for drawing circles and the things that you use for finding north both called compasses? This is confusing.
(1 vote)
• why is the volume for pryamid 1/3Bh
• because its is in the 3rd dimension and if u put 3 pyramids in a prism 2/3 of it would be filled and 1/3 wouldnt