MathDB
Problems
Contests
National and Regional Contests
USA Contests
USA - College-Hosted Events
BMT Problems
2013 BMT Spring
3
BMT 2013 Spring - Geometry 3
BMT 2013 Spring - Geometry 3
Source:
December 29, 2021
geometry
Problem Statement
Given a regular tetrahedron
A
B
C
D
ABCD
A
BC
D
with center
O
O
O
, find
sin
∠
A
O
B
\sin \angle AOB
sin
∠
A
OB
.
Back to Problems
View on AoPS