Crossword-Solution: BISECTORS 9 letters, 2 clues 🏆 scrabble score: 13

Joining places where the recorded times were the same, they notice that the perpendicular bisectors of these lines intersect within an area which agrees practically with that determined by the azimuths.

The solution shows, though Euclid does not state this, that the problem has but one solution; and also, _The three bisectors of the interior angles of any triangle meet in a point, and this is the centre of the circle inscribed in the triangle._ The solutions of most of the other problems contain also theorems.

The bisectors of the various interior and exterior angles of a triangle are concurrent by threes in the incenter or in one of the three excenters of the triangle.

Engineers often check their work by taking three chords, the perpendicular bisectors of the three passing through a single point.

Thus if a point of the body be displaced from A to B, whilst the point which was at B is displaced to C, and that which was at C to D, the four points A, B, C, D lie on a helix whose axis is the common perpendicular to the bisectors of the angles ABC, BCD.