評論
打印
Angles
角度
Let's think about a triangle.
讓我們想想三角形。
A triangle has three points, at each point, two lines meet together, this point is called an angle.
三角形有三個頂點，每個頂點連接著兩條線，這個頂點就叫做角。
How do people measure an angle?
你知道人們如何測量角度嗎？
Angles are measured in degrees.
角度是以度數來衡量的。
Do you know what a surprising fact is?
你知道一個驚人的事實嗎？
Do you want to know a surprising fact?
你想知道這個驚人的事實嗎？
Let's add three endpoint angles of a triangle, the sum will always be 180°.
無論三角形的形狀和大小怎么樣，
No matter what the shape or the size of the triangle.
三角形的三個內角加起來總是180°。
