底边 (dǐ biān) — base (of a triangle or other geometric figure)

Definition

Examples

• 这个三角形的底边长度是五厘米。
  Zhè ge sān jiǎo xíng de dǐ biān cháng dù shì wǔ lí mǐ.
  The base of this triangle is five centimeters long.
• 梯形的底边比上边长很多。
  Tī xíng de dǐ biān bǐ shàng biān cháng hěn duō.
  The base of a trapezoid is much longer than its top side.
• 建筑物的底边必须非常稳固。
  Jiàn zhù wù de dǐ biān bì xū fēi cháng wěn gù.
  The base of a building must be very stable.