Contextes de border

Contextes de border pour le sens abstrait

Lien: http://www.ies.co.jp/math/java/geo/tochia/tochia.html

The land is divided into two parts (P and Q) by the border ABC. Redraw
a straight border line passing through point A so that each of the area
does not change. [tochia.gif]
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The land is divided into two parts (P and Q) by the border ABCD. Redraw
a straight border line passing through point A so that each of the area
does not change. [tochib.gif]