straight
加入词篮straighten
erect
parallel
midpoint
endpoint
oblique
extend
extendable
extended
extension
extension lead
vertical
intersect
intersection
perpendicular
triangle
equilateral triangle
isosceles triangle
right triangle
hypotenuse
angle
acute angle
obtuse angle
supplementary angle
complementary angle
goniometer
quadrangle
quadrilateral
opposite angle
adjacent angle
pentagon
pentagonal
the Pentagon
pentagram
perimeter
sine
cosine
cos
sinusoid
tangent
cotangent
circle
radius
diameter
center
chord
round
loop
circular
circulation
circuit
circulate
semicircle
dot
compass
encompass
sector
arc
concentric
camber
cambered
tangent line
tangency
tangential
contingency
solid
cube
cubic
cuboid
cylinder
cone
sphere
square
rectangle
rectangular
parallelogram
rhombus
trapezoid
oval
spiral
streamline
perimeter
circumference
side
on all sides
on the left side
on the right side
surface area
superficial
superficies
surface
calculate
calculation
calculable
calculator
calculus
count
recount
curve
