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Colors and Shapes /

Lines, Angles, and Curves

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axis
2-
cross
3-
diagonal
4-
parallel
5-
perpendicular
6-
tangent
7-
secant
8-
obtuse angle
9-
right angle
10-
oblique angle
11-
plane angle
12-
arc
13-
crescent
14-
curl
15-
spiral
16-
parabola
17-
hyperbola
axis
axis
noun
a
æ
x
ks
i
ə
s
s
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an imaginary line in the middle of an object around which the object revolves

cross
cross
noun
c
k
r
r
o
ɑ:
ss
s

a mark or an object formed by two short lines or pieces crossing each other

diagonal
diagonal
noun
d
d
ia
aɪæ
g
g
o
ə
n
n
a
ə
l
l

a straight line connecting opposite corners of a flat shape at an angle

parallel
parallel
noun
p
p
a
ɛ
r
r
a
ə
ll
l
e
ɛ
l
l

a pair of geometric figures, such as lines or planes, that do not meet or intersect, no matter how far they are extended

perpendicular
noun
p
p
e
ɜ
r
r
p
p
e
ə
n
n
d
d
i
ɪ
c
k
u
j
ə
l
l
a
ɜ
r
r

a line or structure that meets another at a right angle, creating a 90-degree intersection

tangent
tangent
noun
t
t
a
æ
n
n
g
ʤ
e
ə
n
n
t
t

a straight line that touches a curve or surface at exactly one point, known as the point of tangency

secant
secant
noun
s
s
e
i:
c
k
a
ə
n
n
t
t

a line that crosses a curve at least at two distinct points

obtuse angle
noun
uk flag
/əbtˈuːs ˈæŋɡəl/

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

right angle
right angle
noun
uk flag
/ɹˈaɪt ˈæŋɡəl/

an angle measuring exactly 90 degrees

oblique angle

Grammatical Information:

compound noun
oblique angle
noun
uk flag
/əblˈiːk ˈæŋɡəl/

an angle that measures either less or more that 90 degrees

right angle

Grammatical Information:

compound noun
plane angle
noun
uk flag
/plˈeɪn ˈæŋɡəl/

the measure of the tilt between two lines or surfaces in two-dimensional space, typically given in degrees or radians

Grammatical Information:

compound noun
arc
arc
noun
a
ɑ
r
r
c
k

(geometry) a part of a circle, which is curved

crescent
crescent
noun
c
k
r
r
e
ɛ
s
s
c
e
ə
n
n
t
t

a curved shape with narrow points at the ends that appears wider in the middle, like the shape of the moon in its first and last quarters

curl
curl
noun
c
k
u
ɜ
r
r
l
l

something that resembles a spiral or coil

spiral
spiral
noun
s
s
p
p
i
r
r
a
ə
l
l

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

parabola
parabola
noun
p
p
a
ɜ
r
r
a
æ
b
b
o
ə
l
l
a
ə

(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

hyperbola
noun
h
h
y
p
p
e
ɜ
r
r
b
b
o
ə
l
l
a
ə

a geometric curve formed by the intersection of a plane with two cones, resulting in two symmetrical branches

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