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Vocabulary for IELTS Academic (Band 5) - Geometry

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

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Vocabulary for IELTS Academic (Band 5)
cube
cube
[noun]

a three-dimensional figure made of six square or rectangular faces

Ex: The storage box was shaped like a cube. 
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oval
oval
[noun]

a shape that is wide in the middle and narrow at both ends

Ex: The artist painted an oval in the center of the canvas for emphasis. 
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diamond
diamond
[noun]

a shape with four equal, sloping straight sides, forming a point at the top and another at the bottom

Ex: The baseball field was laid out in the form of a diamond. 
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angle
angle
[noun]

the space between two lines or surfaces that are joined, measured in degrees or radians

Ex: She used a protractor to measure the angle of the triangle accurately. 
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line
line
[noun]

a row of people or things behind each other or next to each other

Ex: The buses were parked in a line at the bus station. 
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point
point
[noun]

(geometry) an element that only has position, with no size or dimension

Ex: A point is represented by a dot in a geometric figure. 
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pyramid
pyramid
[noun]

a solid with a polygonal base and triangular faces that meet at a single point

Ex: Students modeled a pyramid using cardboard. 
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surface
surface
[noun]

(geometry) any of the two-dimensional faces of a three-dimensional figure

Ex: A cube has six identical square surfaces. 
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heart
heart
[noun]

a shape that consists of two curved lines at the top and a V shape at the bottom

Ex: She drew a heart next to his name in the letter. 
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circle
circle
[noun]

a completely round, plain shape

Ex: She used a compass to draw a small circle on the map. 
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square
square
[noun]

a shape with four equal straight sides and four right angles, each measuring 90°

Ex: Each tile on the bathroom floor was a small square shape. 
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arch
arch
[noun]

anything with a curved top and parallel sides

Ex: The old stone bridge featured a beautiful arch that spanned the river. 
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zigzag
zigzag
[noun]

(geometry) a shape that consists of a line alternating its direction to left and right

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semicircle

any half of a circle

Ex: The children sat in a semicircle around the teacher during story time. 
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spiral
spiral
[noun]

(geometry) a curved shape or design that gradually winds around a center or axis

Ex: The staircase in the old mansion featured an elegant spiral that ascended to the upper floors. 
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curve
curve
[noun]

a line or shape that is not straight and bends gradually

Ex: He drew a curve on the paper to represent the arc of the ball's trajectory. 
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disk
disk
[noun]

an object that has a flat, round, and circular shape

Ex: She inserted the metal disk into the slot to activate the machine. 
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hemisphere

one of the two halves of the Earth, separated by the equator or a meridian

Ex: The Northern Hemisphere experiences winter when the Southern Hemisphere is in summer. 
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lobe
lobe
[noun]

a rounded projection or section forming part of a larger structure

Ex: The lobe of the ear is soft and fleshy. 
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rectangle
rectangle
[noun]

(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other

Ex: In geometry class, they practiced calculating the area of a rectangle. 
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triangle
triangle
[noun]

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

Ex: The artist used a triangle shape to create a dynamic composition. 
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acute angle

an angle that measures between 0 and 90 degrees, which is less than a right angle (90 degrees)

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obtuse angle

an angle that measures more than 90 degrees but less than 180 degrees

Ex: In a triangle, an obtuse angle is one that is greater than 90 degrees but less than 180 degrees. 
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right angle

an angle measuring exactly 90 degrees

Ex: To construct a square, each corner must form a perfect right angle. 
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straight angle

an angle that measures exactly 180 degrees, which is the same as a straight line

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axis
axis
[noun]

a straight line that defines the symmetry or structure of a figure or object

Ex: The artist drew an axis to guide the proportions of the face. 
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