アカデミック IELTS (バンド 6-7) - Geometry

(geometry) a solid or hollow shape with two circular bases at each end and straight parallel sides

円柱

(geometry) a round object that every point on its surface has the same distance from its center

球

(geometry) a closed shape with six straight sides and six angles

六角形

(geometry) a three dimensional shape with a circular base that rises to a single point

円錐

(mathematics) the ratio of the opposite to the adjacent side of a triangle that has one angle of 90°

タンジェント

a straight line with one endpoint that extends infinitely in the other direction

光線

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

二等辺三角形

(geometry) a polygon consisting of eight straight sides and eight angles

八角形

in geometry, a pattern or shape that exhibits a twisting or spiraling motion, often characterized by continuous, curved lines forming a rotational or helical design

渦

a point where two or more lines, edges, or rays meet to form an angle, or the point at which the sides of a polygon intersect

頂点

(geometry) a closed plane curve that has two focal points

楕円

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

多角形

a geometric shape with five angles and five straight sides

五角形

(geometry) a line curved on a conical or cylindrical surface, like a spiral staircase in shape

ヘリックス

(geometry) a flat polygon with ten straight sides and ten angles

十角形

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

九角形

a seven-sided plane shape consisting of seven line segments or edges that meet at seven interior angles

七角形

a three-dimensional shape similar to a stretched or compressed sphere

楕円体

a three-dimensional geometric shape with six rectangular faces, resembling a box or a rectangular prism

直方体

(geometry) a round 3D shape like a ball that is slightly flattened at the top and bottom points

球体

(geometry) a solid figure with flat sides and two parallel ends of the same size and shape

プリズム

a solid shape made of flat sides that fit together along their edges

多面体

a three-sided polygon

三角形

(geometry) a flat star-shaped figure with six points that can be formed by making equilateral triangles on each side of a regular hexagon

ヘキサグラム

an angle that measures either less or more that 90 degrees

斜角

an angle that measures greater than 180 degrees but less than 360 degrees

反射角

a straight line from one side of a round object, particularly a circle, passing through the center and joining the other side

直径

(geometry) the length of the external boundary of a curved shape, especially a circle

円周

the length of a straight line drawn from the center of a circle to any point on its outer boundary

半径