Vocabulary for IELTS Academic (Band 6-7) - Geometry

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

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cylinder

[noun]

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

Ex: The glass on the table was in the shape of a tall, slender cylinder.

sphere

[noun]

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

Ex: The planet was modeled as a sphere for calculations.

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: The traffic cones were placed along the road to redirect vehicles during the construction work.

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: The geometry teacher drew a ray from point A through point B.

isosceles triangle

[noun]

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

Ex: In an isosceles triangle, the base angles opposite the equal sides are congruent.

octagon

[noun]

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

Ex: The stop sign is shaped like an octagon.

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: The galaxy's arms displayed a beautiful swirl pattern, creating an aesthetic spiral shape.

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: In a triangle, each of its three corners is a vertex where two sides meet.

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: A triangle is the simplest type of polygon with three sides.

pentagon

[noun]

a geometric shape with five angles and five straight sides

Ex: The flag of the city had a pentagon in the center, symbolizing the five founders.

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: My young daughter proudly showed me the colorful heptagon she had cut out for her geometry homework assignment.

ellipsoid

[noun]

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

Ex: The Earth is often approximated as an oblate ellipsoid due to its slightly flattened shape at the poles.

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 cube is a well-known example of a polyhedron, with six square faces.

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: In a parallelogram, opposite angles are oblique angles since they are not right angles.

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 diameter of a circle is the longest distance between any two points on its circumference, passing through the center.

circumference

[noun]

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

Ex: The formula for finding the circumference of a sphere involves multiplying the diameter by π (pi).

radius

[noun]

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

Ex: The radius of a circle is half the length of its diameter, extending from the center to any point on the circumference.

Vocabulary for IELTS Academic (Band 6-7)
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

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