If 180° in a T. stands for "180° in a
Triangle" what do the following mean?
(a) P.L.s never meet
(b) An I.T. has two E.A.
(c) 1, 3, 6 and 10 are the first four T.N.

If 180 in a T stands for 180 in a Triangle what do the following mean a PLs never meet b An IT has two EA c 1 3 6 and 10 are the first four TN class=