A triangle.一个三角形
A triangle has three sides.三角形有三条边。
In this triangle, sides AB and BC are perpendicular to each other. /,pɜːp(ə)n'dɪkjʊlə/
在这个三角形中，AB和BC是互相垂直的
A square.一个正方形
A square has four equal sides.正方形有四条等边。92
All four angles are right angles, or 90 degrees. 这四个角都是直角，或者说90度。 90
Two intersecting lines.两个相交线。/,ɪntɚ'sɛkt/
These two lines intersect or cross at a 90 degree angle. 这两条线以90度角相交。
They are perpendicular to each other.它们彼此垂直。
A circle is round.
All points on a circle are the same distance from its center. 圆上的所有点到圆心的距离都是相等的。90
Two parallel line.两条平行的线。 /'pærəle/
These two lines never intersect because they are parallel. 这两条线永不相交，因为它们是平行的。
An angle.
These two lines meet at a 30 degree angle.这两条线以30度角相交。91
(A circle has no straight lines.) 87
Watch something.
They are watching a movie on television. 他们正在看电视上的电影。/tɛləˌvɪʒən/
Meet someone.
He is meeting her for the first time. 他是第一次见到她。
Talk with someone.
He is talking with a friend on his phone. 他正在和一个朋友通电话。92
Work with someone.
She is working with her co-worker. 她正在和同事一起工作。92
Interview someone.
She is interviewing a famous basketball player.她正在采访一位著名的篮球运动员。
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