1.   The iMow follows the wire and then moves inward to mow the rest of the lawn in a triangular pattern.

2.   The word is derived from a triangular pattern, as on a piece of land or a garment, not from a description of an accident scene.

3.   Three of the balls are placed in a triangular pattern on a flat surface, each one touching the other two.

4.   She said McVeigh explained that the barrels would be arranged in a triangular pattern inside the truck, with the base of the triangle parallel with the federal building.