边边角 直角时 钝角时

角度：急性，钝角，直和右 (Angles: Acute, Obtuse, Straight and Right)

There are four types of angles depending on their size in degrees. These are:

角度的大小取决于角度，有四种类型。 这些是：

• Right angles直角
• Straight angles直角
• Acute angles锐角
• Obtuse angles钝角

直角 (Right angles)

Right angles are angles that have a measure of exactly 90°. For example, the angle at the corner of a square or rectangle is a right angle. An example of a right angle is below:

直角是指正好为90°的角度。 例如，正方形或矩形的角上的角度是直角。 直角的示例如下：

直角 (Straight angles)

Right angles are angles that have a measure of exactly 180°. For example, a straight line has a straight angle. An example of a straight angle is below:

直角是指正好为180°的角度。 例如，一条直线具有一个直角。 直角的示例如下：

锐角 (Acute angles)

Acute angles are angles that have a measure of less than 90°. For example, a capital letter "A" has an acute angle. An example of an acute angle is below:

锐角是小于90°的角。 例如，大写字母“ A”具有锐角。 锐角的示例如下：

钝角 (Obtuse angles)

Obtuse angles are angles that have a measure of more than 90° but less than 180°. For example, a clock showing 5 o'clock has an obtuse angle. An example of an obtuse angle is below:

钝角是指角度大于90°但小于180°的角度。 例如，显示5点钟的时钟具有钝角。 钝角的示例如下：

例子 (Examples)

例子1 (Example 1)

What is the measure of the largest integer acute angle? Since acute angles are angles with a measure less than 90°, the largest integer acute angle will have a measure of 89°.

最大整数锐角的度量是多少？ 由于锐角是小于90°的角度，因此最大的整数锐角将具有89°的大小。

例子2 (Example 2)

What is the measure of the smallest integer obtuse angle? Since obtuse angles are angles with a measure larger than 90°, the smallest integer obtuse angle will have a measure of 91°.

最小整数钝角的度量是多少？ 由于钝角是度量大于90°的角，因此最小的整数钝角将具有91°的度量。

例子3 (Example 3)

What is the measure of the angle in a capital letter "L", and what type of angle is it?The measure of the angle in a capital letter "L" is 90°, and the angle is a right angle.

大写字母“ L”中的角度的度量是什么，它是什么类型的角度？大写字母“ L”中的角度的度量是90°，而该角度是直角。

有关数学的更多文章： (More articles about math:)

• JavaScript Math Functions explained

  JavaScript数学函数解释

翻译自: https://www.freecodecamp.org/news/angle-names-in-geometry-acute/

边边角 直角时 钝角时