# 3D Shapes English Vocabulary for Children to learn Math

## 3D Shapes Vocabulary for Children to learn Math Children need to understand and use these words if they are to make good progress in understanding shape and space.
The vocabulary for shape and space has been separated into three sections:
-  2D shape
-  3D shape
-  properties of shape
The properties of shape section also draws on vocabulary from the sections on patterns and symmetry and position, direction and movement, where these will  further support children’s understanding.
The words listed for each year include vocabulary from the previous year, with new words for the year printed in red from Year 1 onwards.

 ApexĐỉnh BaseCác đường song song Cube Hình hộp chữ nhật

 Cylinder Hình trụ Height Chiều cao Pyramid hình chóp

 Width Chiều rộng Length Chiều dài Side Cạnh Depth Chiều sâu A half (1/2) một nửa A third (1/3) một phần ba A quarter (1/4) một phần tư Whole toàn bộ

• a half (1/2)  = một nửa

a quarter (1/4)  = một phần tư

a third (1/3) = một phần ba

whole =  toàn bộ

apex = Góc

in a pyramid, the vertex at which all lateral faces meet

base = Đỉnh

in a prism, the two congruent, parallel faces at the top and bottom; in a pyramid, the regular polygon that is not a lateral face

congruent = mặt

having the same size and shape

cube = Hình hộp chữ nhật

a polyhedron with six congruent, square faces

cylinder = Hình trụ

a three-dimensional object with circular bases

dodecahedron

a polyhedron with 12 congruent, pentagonal faces

edge

the segment along which two faces meet

Euler's Theorem

for any polyhedron, the sum of the number of vertices and faces is equal to two more than the number of edges; stated another way, F + V - E = 2

face= Mặt phẳng

one of the surfaces of a polyhedron

height = Chiều cao

the distance from top to bottom of a three-dimensional figure

icosahedron

a polyhedron with 20 congruent, triangular faces

lateral face

in a prism, one of the rectangles that connects the bases to one another; in a pyramid, one of the triangles that connects the base to the apex

length = Chiều dài

the longest dimension of a solid figure; for a three-dimensional figure, it is usually the distance from front to back

width - chiều rộng

depth = Chiều sâu

octahedron

a polyhedron with eight congruent, triangular faces

polygon

a two-dimensional figure formed by connecting three or more straight line segments end to end (triangles, squares, and hexagons are examples of polygons)

pyramid = hình chóp

polyhedron

a three-dimensional figure whose faces are polygons

prism

a three-dimensional figure with two parallel, congruent bases connected by rectangles

rectangular prism

a prism whose bases are rectangles; in general, a prism can be described by the shape of its bases

right prism

a prism in which the bases meet the lateral faces at right angles

tetrahedron

a polyhedron with four congruent, triangular faces

truncated icosahedron

a polyhedron with 32 faces, 12 of which are pentagons and 20 of which are hexagons

vertex vertices[plural]

the point at which three or more faces meet

width = Chiều dài

distance from side to side