Academic IELTS Words for "Geometry"

Here, you will learn some English words related to Geometry that are necessary for the Academic IELTS exam.

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Vocabulary for IELTS Academic (Band 6-7)

cylinder [noun]

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

Ex: The artist sculpted a beautiful marble cylinder as part of a modern art installation .

sphere [noun]

(in geometry) a three-dimensional surface where all points are equidistant from a center

Ex: Spheres are often used in design for their smooth and harmonious appearance .

hexagon [noun]

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

Ex: She decided to tile her bathroom floor with hexagon-shaped tiles.

cone [noun]

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

Ex:

tangent [noun]

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

Ex: If the tangent of an angle is 1 , it means the height and base of our triangle are the same .

ray [noun]

a straight line that starts at a point and extends infinitely in one direction

Ex: A ray has a definite starting point but no end .

isosceles triangle [noun]

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

Ex: The altitude drawn from the vertex angle of an isosceles triangle bisects the base into two equal segments .

octagon [noun]

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

Ex: Each of the eight sides of the octagon was painted a different color .

swirl [noun]

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

Ex: An artistic representation of wind currents might include swirls to convey the fluid dynamics .

vertex [noun]

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

Ex: The meeting point of the two arms of an angle is referred to as the vertex of the angle .

ellipse [noun]

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

polygon [noun]

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

Ex: The stop sign is an example of an octagonal polygon .

pentagon [noun]

a geometric shape with five angles and five straight sides

Ex: The stop sign is shaped like a red pentagon to alert drivers to halt .

helix [noun]

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

decagon [noun]

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

Ex: Architects sometimes incorporate shapes like the decagon into their designs for a unique appearance .

nonagon [noun]

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

heptagon [noun]

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

Ex: One version of the game featured a board laid out in a grid of non-uniform heptagons instead of the usual squares .

ellipsoid [noun]

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

Ex: In geodesy , the reference ellipsoid is used as a mathematical model to represent the Earth 's shape .

cuboid [noun]

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

spheroid [noun]

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

Ex: The Earth is not quite a sphere but is better described as an oblate spheroid flattened at the poles .

prism [noun]

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

polyhedron [noun]

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

Ex: The polyhedron 's vertices are the points where its edges meet .

trigon [noun]

a three-sided polygon

hexagram [noun]

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

oblique angle [noun]

an angle that measures either less or more that 90 degrees

Ex: A 45-degree angle is considered an oblique angle , falling between 0 and 90 degrees .

reflex angle [noun]

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

diameter [noun]

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

Ex: The engineer measured the diameter of the pipe to ensure it would fit snugly within the existing framework .

circumference [noun]

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

Ex: To find the circumference of a wheel , you need to know its radius or diameter .

radius [noun]

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

Ex: The architect calculated the radius of the dome to ensure its proportions were aesthetically pleasing .

Vocabulary for IELTS Academic (Band 6-7)
Size and Scale	Dimensions	Weight and Steadiness	Increase in Amount
Decrease in Amount	Intensity	Time and Duration	Space and Area
Shapes	Speed	Significance	Insignificance
Strength and Influence	Uniqueness	Commonness	Complexity
High Quality	Low Quality	Value	Challenges
Wealth and Success	Poverty and Failure	Age and Appearance	Body Shape
Wellness	Intellectual Capability	Intellectual Incapabilities	Positive Human Traits
Negative Human Traits	Moral Traits	Financial Behaviours	Social Behaviours
Short-tempered Traits	Positive Emotional Responses	Negative Emotional Responses	Positive Emotional States
Negative Emotional States	Tastes and Smells	Sounds	Textures
Temperature	Probability	Attempt and Prevention	Opinions
Thoughts and Decisions	Encouragement and Discouragement	Knowledge and Information	Request and Suggestion
Respect and Approval	Regret and Sadness	Relational Actions	Physical Actions and Reactions
Body Language and Gestures	Postures and Positions	Movements	Engaging in Verbal Communication
Understanding and Learning	Perceiving The Senses	Commanding and Giving Permissions	Predicting
Touching and Holding	Changing and Forming	Creating and Producing	Organising and Collecting
Preparing Food	Eating and Drinking	Science	Education
Research	Astronomy	Physics	Biology
Chemistry	Geology	Philosophy	Psychology
Maths and Graphs	Geometry	Environment	Landscape and Geography
Engineering	Technology	Internet and Computer	Manufacture and Industry
History	Religion	Culture and Custom	Language and Grammar
Arts	Music	Film and Theatre	Literature
Architecture	Marketing	Finance	Management
Medicine	Sickness and Symptoms	Law	Energy and Power
Crime	Punishment	Government	Politics
Measurement	War	Positive Emotions	Negative Emotions
Travel and Tourism	Migration	Food and Drinks	Materials
Pollution	Disasters	Weather	Animals
Adverbs of Manner	Adverbs of Degree	Adverbs of Comment and Certainty	Adverbs of Time and Frequency
Adverbs of Purpose and Emphasis	Conjunctive Adverbs