等边三角形 [
děng biān sān jiǎo xíng]
equilateral triangle
- 等边三角形不能分成有限多个不全等的等边三角形。
An equilateral triangle cannot be dissected into finitely many incongruent equilateral triangles. - 像是镌刻在大理石上的等边三角形。三角形中有一个内接圆;圆和三角形都被竖直等分。
Equilateral triangle that appears to be carved into marble. The triangle contains a circle; both are bisected vertically. - 一个等边三角形,边长为2,在三角形内从三个顶点各有一个边长为1的6分之一圆,三圆相切,问中间部分?
Two Dice,6 faces each represent one Number, when thrown twice,how many different Value of the sum of the results?无sum为1的可能.
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