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perpendicular bisector

The perpendicular bisector of a line segment AB is the straight line perpendicular to AB through the midpoint of AB.

Thiessen polygon

Thiessen polygon   Quick reference

A Dictionary of Geography (5 ed.)

Reference type:
Subject Reference
Current Version:
2015

...polygon A subdivision of a drainage basin, containing a rain gauge. Polygons are constructed by first siting the rain gauges, plotting them on a base map, and connecting the sites by straight lines. The lines are bisected with perpendiculars, which meet to form the polygons. The areas of the polygons are calculated and expressed as fractions of the total area. Each fraction is multiplied by the precipitation recorded by its rain gauge. The sum of these calculations represents total precipitation over the catchment area. For an account, see Yoo et al....

Curling

Curling   Reference library

Morris MOTT

Berkshire Encyclopedia of World Sport (3 ed.)

Reference type:
Subject Reference
Current Version:
2016
Subject:
Social sciences, Society and culture
Length:
3,641 words

...to complete all of its throws. They forfeit the match if they fail to do so. Curling Rinks A standard curling rink is between 14.5 and 15 feet wide and at least 146 feet long. As each end is played, only 132 feet of the 146 feet are in play. A centerline bisects the length of the ice, and four perpendicular lines cross the width of the ice at both ends. ( See figure 1 .) The house is centered where the tee line intersects the centerline. The stone must be released before its leading edge touches the near hog line. If a player is still in contact with a stone...

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