色と形 - 2次元形状

a completely round, plain shape

円

(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

長方形, 長方形の

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

ひし形, 凧

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

台形

(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

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

ひし形, ロムバス

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

多角形

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

斜三角形, 直角ではない三角形

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

不等辺三角形, 不規則な三角形

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, 等辺三角形

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

鋭角三角形, 角が鋭い三角形

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

鈍角三角形, 鈍角の三角形

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

ひし形

any half of a circle

半円

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

ひし形, ロゼンジ

a rectangular figure that has unequal adjacent sides with arched angles

オブロング,長方形, round-edged rectangle

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

オーバル, 楕円