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ACT 数学と評価 - Geometry
ここでは、ACTで高得点を取るのに役立つ「接線」、「頂点」、「楕円」などの幾何学に関連する英語の単語をいくつか学びます。
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the measure of how steep a line is, found by dividing the change in height by the change in horizontal distance
勾配
(geometry) a part of a circle, which is curved
弧, 円の一部
a unit for measuring angles, defined by the angle made when the radius of a circle is laid along its edge
ラジアン, 円の半径がその端に沿って置かれたときに作られる角度で定義される角度の測定単位
the length of a straight line drawn from the center of a circle to any point on its outer boundary
半径, 半直径
a straight line from one side of a round object, particularly a circle, passing through the center and joining the other side
直径, 直径
the total length of the external boundary of something
周囲
(geometry) the length of the external boundary of a curved shape, especially a circle
円周
the measurement of a piece of land or a flat surface
面積
the amount of space that a substance or object takes or the amount of space inside an object
体積, 容量
the space between two lines or surfaces that are joined, measured in degrees or radians
角度, 角度 (測定)
an angle measuring exactly 90 degrees
直角, 90度の角度
one of a pair of opposite angles made by two intersecting lines, which are always equal
垂直角, 対頂角
an angle formed between two sides of a polygon that lies inside the shape
内角, 内部の角度
an angle that measures between 0 and 90 degrees, which is less than a right angle (90 degrees)
鋭角, 90度未満の角度
pairs of angles that share a common side and vertex in a polygon or between intersecting lines
連続する角, 隣接する角
(of angle) greater than 90 degrees but less than 180 degrees
鈍角の
a measuring instrument used to measure and draw angles
分度器, 角度計
(of lines or planes) intersecting each other at a 90 degree angle
垂直な, 直角に交わる
(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
(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
characterized by or resembling a tetrahedron, which has four triangular faces
四面体の, 四面体のような
a geometric shape with five angles and five straight sides
五角形, 五辺形
(geometry) a flat figure with four straight sides and four angles
四角形, 四つの直線の辺と四つの角を持つ平面図形
a small circle whose center moves around the circumference of a larger circle
エピサイクル, 二次円
a geometric curve formed by the intersection of a plane with two cones, resulting in two symmetrical branches
双曲線, 双曲線の曲線
(geometry) a symmetrical open curve that is similar to the path of an object thrown into the air passes till it falls back to earth
放物線, 放物線曲線
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 in which all three interior angles are less than 90 degrees
鋭角三角形, 鋭角の三角形
a type of triangle with all three sides of equal length
正三角形, 正三角形
a type of triangle 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
describing a triangle with at least two sides of equal length
二等辺
the longest side of a right-angled triangle, opposite the right angle, and defined as the side opposite the right angle in a right-angled triangle
斜辺, 直角三角形の最も長い辺で、直角の対辺
a three-dimensional geometric shape with two parallel circular bases connected by a curved surface at a right angle to the bases
直円柱, 円形の底を持つ直角円柱
a three-dimensional geometric shape that has a rectangular base and four triangular faces that meet at a single point called the apex
長方形のピラミッド, 長方形の底辺を持つピラミッド
(geometry) a lack of symmetry or equivalence in shape or size between the two sides or parts of something
非対称
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, バーテックス
a straight line connecting opposite corners of a flat shape at an angle
対角線, 斜め線
(in geometry) describing shapes of the same size and form
合同, 一致する
the side of a geometric shape, usually the one considered as the bottom, from which the height is measured
底辺, 基底辺
a pair of geometric figures, such as lines or planes, that do not meet or intersect, no matter how far they are extended
平行, 平行線
a line that divides a shape into two congruent parts
対称線, 対称軸
a series of numbers in which each term after the first is found by multiplying the previous term by a fixed, non-zero number
幾何級数, 等比数列
the total area that the surface of a three-dimensional object occupies
表面積, 表面
(of a line) intersecting two or more other lines at different points
横断的な, 交差する
one-fourth of a circle, formed by two perpendicular radii and the connecting arc
象限, 四分円
a straight line that a curve approaches indefinitely but never intersects, characterizing the limiting behavior of the curve
漸近線, 漸近的な線
to divide something into two equal parts
二等分する, 真っ二つに分ける
a straight line that touches a curve or surface at exactly one point, known as the point of tangency
接線, タンジェント線
a straight line segment that connects two points on the edge of a circle
弦, 和音
(geometry) to move a shape or figure from one position to another without rotating, resizing, or otherwise altering its shape
平行移動する, 移動する
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