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a completely round, plain shape
円, 丸
(geometry) a flat shape consisting of three straight sides and three angles
三角形, 三角形状
(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other
長方形, 長方形の図形
a shape with four equal straight sides and four right angles, each measuring 90°
正方形, 四角形
(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, 四つの直線からなる平面図形で、向かい合う辺が等しく平行であるもの
(geometry) a flat shape consisting of three or more straight sides
多角形, 三つ以上の直線で囲まれた平面図形
a flat geometric shape consisting of three straight sides and one right angle
直角三角形, 直角を持つ三角形
a triangle that does not have a right angle
斜角三角形, 非直角三角形
a type of triangle that has all three sides of different lengths
不等辺三角形, すべての辺の長さが異なる三角形
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 with all three sides of equal length
正三角形, 正三角形
a type of triangle in which all three angles are less than 90 degrees
鋭角三角形, 鋭角の三角形
a type of triangle that has one angle greater than 90 degrees
鈍角三角形, 鈍角を持つ三角形
any half of a circle
半円, 半円形
(geometry) a figure with four sides and two opposite angles more than 90° and two of less than 90°
菱形, 斜方形
a rectangular figure that has unequal adjacent sides with arched angles
長方形,細長い長方形, round-edged rectangle
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