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单词 IsoscelesTriangle
释义

isosceles triangle


An isosceles triangleMathworldPlanetmath is a triangle with two congruent sides. The angles opposite these two sides are the base angles and the angle between those sides is the vertex angle of the triangle.

This definition implies that any equilateral triangleMathworldPlanetmath is isoscelestoo, but there are isosceles triangles that are not equilateral.

In any isosceles triangle, the angles opposite to the congruent sidesare also congruent. In fact, this condition could be used to give analternate definition of isosceles, since a triangle is isosceles ifand only if it has two congruent angles.

In an equilateral triangle, the height (http://planetmath.org/BaseAndHeightOfTriangle), the median and the bisectorMathworldPlanetmath tothe third side are the same line.

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更新时间:2025/5/4 8:30:55