MathDB

Three lines

m

n

, and

\ell

lie in a plane such that no two are parallel. Lines

m

and

n

meet at an acute angle of

14^{\circ}

, and lines

m

and

\ell

meet at an acute angle of

20^{\circ}

. Find, in degrees, the sum of all possible acute angles formed by lines

n

and

\ell

.
Ray Li

Problem Statement