(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other
矩形
a shape with four equal straight sides and four right angles, each measuring 90°
広場
(geometry) any flat shape with four straight sides, the opposite sides of which are equal and parallel to each other
平行四辺形
(geometry) a flat shape with four equal sides in which opposite angles are equal
ひし形
a flat geometric shape consisting of three straight sides and one right angle
直角三角形
a type of triangle that has two sides of equal length and two angles of equal measure
二等辺三角形
a type of triangle in which all three angles are less than 90 degrees
鋭角な三角形
a type of triangle that has one angle greater than 90 degrees
鈍角三角形
(geometry) a figure with four sides and two opposite angles more than 90° and two of less than 90°
錠剤
a rectangular figure that has unequal adjacent sides with arched angles
湾曲した角を持つ長方形の図形