triangle (n)
/ˈtraɪˌæŋɡl/

hình tam giác

a flat shape with three straight sides and three angles

wide (a)
/waɪd/

rộng lớn

having a larger distance from one side to the other than is usual or expected

thick (a)
/θɪk/

dày

having a large distance between two sides

shape (n)
/ʃeɪp/

hình dạng, hình thù

the form of the outer edges or surfaces of something; an example of something that has a particular form

width (n)
/wɪtθ/

bề rộng, bề ngang

the distance from one side of something to the other

depth (n)
/dɛpθ/

độ sâu

the distance from the top or surface to the bottom of something

horizontal (a)
/ˌhɔrəˈzɑntl/

phương ngang

flat and level; going across and parallel to the ground rather than going up and down

semicircle (n)
/ˈsɛmiˌsərkl/

hình bán nguyệt

one half of a circle

square (n)
/skwɛr/

hình vuông

a shape with four straight sides of equal length and four angles of 90°

height (n)
/haɪt/

chiều cao, bề cao; độ cao

the degree to which something is high or someone is tall

length (n)
/leŋθ/

bề dài, chiều dài, độ dài

the measurement of something from end to end or along its longest side

sphere (n)
/sfɪr/

hình cầu

a solid figure that is completely round

rectangle (n)
/ˈrɛkˌtæŋɡl/

hình chữ nhật

a flat shape with four straight sides, two of which are usually longer than the other two

vertical (a)
 /ˈvɜː.tɪ.kəl/ 

phương thẳng đứng, dọc

standing, pointing, or moving straight up

in parallel (a)
/ˈpærəˌlɛl/

song song

 two or more lines that are parallel to each other are the same distance apart at every point

diagonal (a)
/daɪˈæɡənl/

chéo

(of a straight line) at an angle; joining two opposite sides of something at an angle

immense (a)
/ɪˈmɛns/

rất lớn, bao la

extremely large or great

circle (n)
/ˈsərkl/

hình tròn

 a completely round flat shape

large (a)
/lɑrdʒ/

rộng lớn, lớn

big in size or quantity

narrow (a)
/ˈnæroʊ/

hẹp

measuring a short distance from one side to the other, especially in relation to length