a parallelogram illustrating the theorem that if two forces acting at a point are represented in magnitude and direction by two sides of a parallelogram meeting at that point, their resultant is represented by the diagonal drawn from that point力的平行四边形
柯林斯高阶英汉双解学习词典释义
N-COUNT
平行四边形
A parallelogram is a four-sided shape in which each side is parallel to the side opposite it.
英汉词典释义
n.
<数>平行四边形
These are the opposite sides of the parallelogram.这是平行四边形的对边。
英英词典释义
Noun
1. a quadrilateral whose opposite sides are both parallel and equal in length