Home > Shapes > Geometry
| Perpendicular edge of tetrahedron (Posted on 2021-02-02) |
 |
Let ABCD be a tetrahedron with ∠BAD = 60, ∠BAC = 40, ∠ABD = 80, ∠ABC = 70. Prove that the lines AB and CD are perpendicular.
Comments: (
You must be logged in to post comments.)
|
|
Please log in:
Forums (0)
Newest Problems
Random Problem
FAQ |
About This Site
Site Statistics
New Comments (14)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On
Chatterbox:
|
