euclid's fourth axiom

NOUN
21 LETTERS · STARTS WITH E

euclid's fourth axiom is a valid 21-letter word worth 36 points in Scrabble and 40 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
E1U1C3L1I1D2'0S1F4O1U1R1T1H4A1X8I1O1M3
1 + 1 + 3 + 1 + 1 + 2 + 0 + 1 + 0 + 4 + 1 + 1 + 1 + 1 + 4 + 0 + 1 + 8 + 1 + 1 + 3 =36 PTS
DOUBLE WORD → 72TRIPLE WORD → 108
MEANING

What does euclid's fourth axiom mean?

NOUN · 1 SENSE
1

All right angles are equal.