Angles are usually measured using protractors.

度通常用量器进行测量。

And he didn't use a protractor to make those perfect letters or any other kind of measurements.

他没有使用量器或任何其他的测量方式来做出美的字母。

Protractors have markings on them, similar to rulers, but instead of inches or centimeters it measures in degrees.

量器上有何直尺类似的刻度，但是其刻度是英寸或者是厘米，而是以度来衡量。

Be protractor, in maths we're doing all angles, I absolutely needed this to do any maths lesson.

当量器，数学课上我们要测量度，我全需要这个来上任何数学课。

So definitely the tool used to measure an angle is a protractor, not a new tractor or whatever it was that you said.

所以， 用来测量度的工具绝对是量器，而是什么新拖拉机或者你说的其他东西。

If you don't have a protractor to measure with, you can estimate how big it is as long as you remember what a 90 degree angle, 180 degree angle, and 360 degree angle look like.

如果你没有量器，你可以估计它有多大，只要你记得 90 度，180 度和 360 度是什么样子的就行了。

You can actually, it's hard to show that the Earth is curved, but you can show the Earth is curved using triangles, mountaintops, et cetera, if you have an accurate enough protractor.

实际上，虽然很难直接展示地球是弯曲的，但借助三形、山顶等工具，如果你有一个足够精确的量器，就能证明地球的曲率。

And if we actually put a protractor on and start to measure that you can see that the measurement on the left side, between zero and that angle, is going to match exactly the angle on the right side.

如果我们实际放一个量器并开始测量，您会发现左侧的测量值（零点和该度之间）将与右侧的度全匹配。