Substantivos Básicos - Formas

a completely round, plain shape

círculo

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

quadrado

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

triângulo

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

retângulo

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

oval

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

forma de diamante

a shape with five or more points, representing a star in the sky

forma de estrela

(geometry) a round object that every point on its surface has the same distance from its center

forma de esfera

a figure, either hollow or solid, with six equal square sides

cubo

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

forma de cilindro

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

cone

a solid object with a square base and four triangular sides joined to a point on the top

pirâmide

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

cubóide

either half of a sphere

hemisfério

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

prisma

(geometry) any flat shape with four straight sides, the opposite sides of which are equal and parallel to each other

paralelograma

(geometry) a flat shape with four flat sides, two of which are parallel

trapézio

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

em forma de crescente

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

sinal de multiplicação

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

espiral

a four-sided shape with two pairs of equal-length adjacent sides

papagaio

a flat geometric shape consisting of three straight sides and one right angle

triângulo retângulo

(geometry) a figure with four sides and two opposite angles more than 90° and two of less than 90°

pastilha

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

esferóide

any half of a circle

semicírculo

a geometric shape with five angles and five straight sides

pentágono

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

hexágono

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

heptágono

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

octógono

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

nonagon

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

decágono

a five-pointed star

pentagrama

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

hexagrama

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

ziguezague

(geometry) a flat figure consisting of eleven straight sides and eleven angles

hendecágono

(geometry) a flat figure that consists of twelve sides and twelve angles

dodecágono

a polygon with thirteen sides and thirteen angles

tridecágono

a rectangular figure that has unequal adjacent sides with arched angles

figura retangular com ângulos curvos

a solid shape resembling a donut or ring, made by spinning a circle around a line that does not cut through the circle

toro

a line or shape that is not straight and bends gradually

curva

(mathematics) any of the pair of geometric figures such as lines or planes which do not meet or intersect

paralelo

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

elipse