a completely round, plain shape

圆, 圆形
(geometry) a flat shape consisting of three straight sides and three angles

三角形, 三角形状
艺术家使用三角形形状来创建动态构图。
(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other

矩形, 长方形
窗户是一个大长方形,让大量自然光进入房间。
a shape with four equal straight sides and four right angles, each measuring 90°

正方形, 方形
(geometry) any flat shape with four straight sides, the opposite sides of which are equal and parallel to each other

平行四边形, 任何有四条直边的平面形状,其对边相等且彼此平行
(geometry) a flat shape consisting of three or more straight sides

多边形, 由三条或更多直线边组成的平面形状
孩子们在他们的几何课上学会了识别不同的多边形。
a flat geometric shape consisting of three straight sides and one right angle

直角三角形, 有一个直角的三角形
a triangle that does not have a right angle

斜三角形, 非直角三角形
我的风筝,形状像一个斜三角形,在多风的天空中翱翔。
a type of triangle that has all three sides of different lengths

不等边三角形, 三边长度都不相等的三角形
在花园里,我注意到由交叉的小路形成的一个不等边三角形。
a type of triangle that has two sides of equal length and two angles of equal measure

等腰三角形
如果一个等腰三角形的角被标记为A、B和C,并且边AB与边BC全等,那么角A与角C全等。
a type of triangle with all three sides of equal length

等边三角形, 等边三角形
金字塔的底座是一个等边三角形。
a type of triangle in which all three angles are less than 90 degrees

锐角三角形, 有锐角的三角形
在数学课上,我们测量了锐角三角形中的角度。
a type of triangle that has one angle greater than 90 degrees

钝角三角形, 有一个钝角的三角形
警告标志显示了一个钝角三角形,表示前方有一个宽阔的转弯。
any half of a circle

半圆, 半圆形
建筑师设计了带有半圆形座位的礼堂以获得更好的音响效果。
(geometry) a four-sided figure with opposite equal angles, forming a diamond shape

菱形, 斜方形
他画了一个菱形来表示钻石的形状。
