Mathematics: Geometry 수학 기하학 영영풀이

[Mathematics: Geometry 수학 기하학 영영풀이]

 

box

noun : a container shaped like a square or rectangle

circle

noun : a round shape, such as a ring, that has all points the same distance from the center

curved

adjective : not straight

diamond

noun : a shape with four equal sides and four angles that are not always right angles

flat

adjective : having a smooth, level surface

line

noun : a long, thin mark made on a surface with a pencil, pen, or other tool

oval

noun : a rounded shape, like the outline of an egg, that does not have all points the same distance from the center

pointed

adjective : having a sharp tip or end

round

adjective : curved; shaped like a circle

slope

noun : an upward or downward slant

square

noun : a shape with four equal sides and four right angles

steep

adjective : having an extreme slope

straight

adjective : without turns, bends, or curves

 

angle

noun : a figure formed by two lines that meet at a point

arc

noun : a section of a circle or other curved shape

base

noun : any side of a polygon, usually used for computing area, along with the altitude perpendicular to it

center

noun : the middle part of something

cone

noun : a solid or hollow object that tapers from a circular base to a point

congruent

adjective : exactly alike in size and shape

corner

noun : the place where two lines, edges, or sides meet to form an angle

cube

noun : a solid geometric shape with six equal, square faces

curve

noun : a continuously bent line having no straight part

cylinder

noun : a hollow or solid object that is shaped like a soup can or a tree trunk, having flat ends that are parallel circles of the same size

degree

noun : a unit used to measure angles equal to 1/360th of the circumference of a circle

diagonal

adjective : slanted; at an angle

diameter

noun : the length of a straight line drawn through the center of a circle or a sphere from one side to another

edge

noun : the part farthest from the center; a line segment where two faces of a polyhedron meet

geometric

adjective : relating to the field of math that deals with angles, points, lines, surfaces, and solids

geometry

noun : the branch of math that deals with lines, angles, surfaces, and shapes

hexagon

noun : a flat geometric shape with six angles and six sides

horizontal

adjective : parallel to the horizon; level or flat

intersection

noun : the point or place where one thing crosses another thing

line segment

noun : a portion of a line with defined endpoints

orientation

noun : the direction or position in which something faces or lies

parallel

adjective : lying or moving in the same direction and an equal distance apart

pentagon

noun : a flat geometric shape with five angles and five sides

perpendicular

adjective : at a 90° angle to a line or plane

plane

noun : a flat surface

point

noun : a definite position on a graph, defined by its coordinates

prism

noun : a solid geometrical shape with identical end faces made of straight lines and sides that are parallelograms

pyramid

noun : a three dimensional, triangular shape that comes to a point at the top

radius

noun : a straight line from a circle's center to the edge of the circle

ray

noun : a straight line that starts at a point and continues on without end

similarity

noun : a quality that makes someone or something alike

sphere

noun : a round solid shape, like a ball

symmetry

noun : having the same size and shape across a dividing line, or having one half identical to the other half

vertex

noun : any corner point of a triangle, square, cube, or other geometrical figure; also, the highest point

vertical

adjective : straight up and down

 

acute angle

noun : an angle that measures less than 90º

acute triangle

noun : a triangle that has three acute angles

chord

noun : a straight line joining the ends of an arc

circumference

noun : the distance around the outside of a circle

concave

adjective : having a shape or surface that curves inward

convex

adjective : having a shape or surface that curves outward

ellipse

noun : a regular oval shape

equiangular triangle

noun : a triangle in which all three angles are equal

equilateral triangle

noun : a triangle that has three sides of equal length and three equal angles

exterior angle

noun : an angle that faces the outside of a polygon

hypercube

noun : a four-dimensional object made only of right angles and lines of equal length

hypotenuse

noun : the side opposite the 90 degree angle on a right triangle

interior angle

noun : an angle that faces the inside of a polygon

isosceles triangle

noun : a triangle with at least two equal sides

obtuse angle

noun : an angle greater than 90º and less than 180º

obtuse triangle

noun : a triangle that has one obtuse angle and two acute angles

pi

noun : a constant value that represents the ratio between the circumference and diameter of a circle

plane figure

noun : a two-dimensional shape; a figure that lies in one plane (on a flat surface)

polyhedron

noun : a solid figure with several faces

protractor

noun : an instrument for measuring the degree of an angle

quadrant

noun : each of four equal parts of a shape or graph

right angle

noun : an angle formed by two lines that are perpendicular to each other and measures 90°

right triangle

noun : a triangle that contains one right angle

scalene triangle

noun : a triangle whose sides are all unequal

secant

noun : a straight line that crosses a circle twice

similar figures

noun : figures that have the same shape but different measurements

symmetrical

adjective : balanced like a mirror image

tangent

noun : a straight line that touches a curve but doesn't cross it

three-dimensional

adjective : having height, width, and depth; 3D

two-dimensional

adjective : having height and width, but no depth