とうきゃくだいけい
等脚台形
1. isosceles trapezoid; isosceles trapezium
2. Isosceles trapezoidIn Euclidean geometry, an isosceles trapezoid (isosceles trapezium in British English) is a trapezoid where the legs have equal length. It can also be defined as a convex quadrilateral with a line of symmetry bisecting one pair of opposite sides, making it automatically a trapezoid. Some sources would qualify all this with the exception: "excluding rectangles. " Two opposite sides (the bases) are parallel, the two other sides (the legs) are of equal length.
Read “Isosceles trapezoid” on English Wikipedia
Read “等脚台形” on Japanese Wikipedia
Read “Isosceles trapezoid” on DBpedia
Read “Isosceles trapezoid” on English Wikipedia
Read “等脚台形” on Japanese Wikipedia
Read “Isosceles trapezoid” on DBpedia
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