颜色和形状 - 二维形状

a completely round, plain shape

圆

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

三角形

(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

a four-sided shape with two pairs of equal-length adjacent sides

菱形, 风筝

a shape with four equal straight sides and four right angles, each measuring 90°

正方形

(geometry) a flat shape with four flat sides, two of which are parallel

梯形

(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

(geometry) a flat shape with four equal sides in which opposite angles are equal

菱形, 平行四边形

(geometry) a flat shape consisting of three or more straight sides

多边形

a flat geometric shape consisting of three straight sides and one right angle

直角三角形, 具有直角的三角形

a triangle that does not have a right angle

斜三角形, 非直角三角形

a type of triangle that has all three sides of different lengths

不等边三角形, 不规则三角形

a type of triangle that has two sides of equal length and two angles of equal measure

等腰三角形

a type of triangle with all three sides of equal length

等边三角形, 三边相等的三角形

a type of triangle in which all three angles are less than 90 degrees

锐角三角形, 三角形的锐角

a type of triangle that has one angle greater than 90 degrees

钝角三角形, 钝角的三角形

(geometry) a parallelogram with four straight sides and no right angles

菱形

any half of a circle

半圆

(geometry) a figure with four sides and two opposite angles more than 90° and two of less than 90°

菱形, 菱角

a rectangular figure that has unequal adjacent sides with arched angles

长方形,椭圆形长方体, round-edged rectangle

a shape that is wide in the middle and narrow at both ends

一个椭圆, 椭圆形