An angle of 90 degrees is called a right angle.

九十度的叫做直。

The vertical band is precision-machined from stainless steel.

直边框由不锈钢精密打造而成。

Take four identical right triangles with side lengths a and b and hypotenuse length c.

取四个全等的直三，两边分别长 a 和 b，斜边长 c。

They're carefully aligned edge to edge at a right angle.

它们呈直严丝合缝地对齐。

Oh, you know what? I need the angled screwdriver.

那个 我需要一个直螺丝刀。

So this right over here is a right angle.

所现在画的这个就一个直。

This, I'm assuming is a right angle.

这个直。

Bertozzi called the field she created bioorthogonal chemistry—orthogonal means intersecting at right angles.

贝尔托齐称她创造的领域为生物正交化学——正交意味着直相交。

A right triangle is a two dimensional figure with three side, two of which are perpendicular.

直三具有三条边的二维图，其中两条垂直的。

The left should form at a right angle and the right knee should almost touch the floor.

左膝应呈直，右膝应几乎触地。

May hurt a little bit, but try as much as possible to create a 90 degree angle.

可能有点痛尽可能成一个直。

The two lines on the left intersect each other at a right angle which is 90 degrees.

左边的两条线90度的直相交。

Root 2 simply is the hypotenuse of a right triangle

而 √2 只两边长度为 1 的 直三之斜边。

Ok, watch me: Just like this, Ok? 90 degree angle.

看着我，就像这样直。

He understood right angles and clear instruction manuals. Assembly models and drawings. Things one could draw on paper.

他理解直和清晰的产品说明，可画到纸上的东西。

The most famous relation in geometry is the relation between the sides and the hypotenuse of a right triangle.

几何中最著名的关系直三的边和斜边之间的关系。

Take your thumb and your middle finger and create as much as possible a 90 degree angle.

让你的姆指和中指尽可能成一个直。

A " right angle" is this square here, it means 90 degrees.

一个“直” 就这里的这个正方， 就90度的意思。

Now from extensive experience, our brains know they really should be rectangles and right angles.

现在，根据丰富的经验，我们的大脑知道它们确实应该矩和直。

Picture a right triangle where side A is the tree.

想象一个直三， 其中 A 边树。