怎么读(音标):/əˈkjuːt ˈæŋɡl/
用法:锐角是指两条直线或者线段的夹角小于90度的角。在几何学中,锐角是三角形的一种类型,它的两条边都比直角小。
例句1:The angle formed by the hands of a clock at 3 o'clock is an acute angle.
钟表在3点钟时指针所形成的角是一个锐角。
例句2:In an equilateral triangle, all three angles are acute angles.
在等边三角形中,所有三个角都是锐角。
例句3:The acute angle between the two walls made it difficult to fit the furniture in the corner.
两面墙之间的锐角使得将家具放进墙角变得困难。
例句4:The pilot had to make an acute angle turn to avoid hitting the mountain.
飞行员不得不进行一个锐角转弯来避免撞上山峰。
例句5:The teacher used a protractor to measure the acute angles in the students' drawings.
老师使用量角器来测量学生作品中的锐角。
同义词及用法:
1. Sharp angle: This is another term used to describe an acute angle, as it conveys the idea of a small and pointed angle.
2. Narrow angle: This can also be used to refer to an acute angle, as it emphasizes that it is smaller than other angles.
3. Acute triangle: This is a type of triangle where all three angles are acute angles.
4. Pointed angle: This is a descriptive term for an acute angle, as it emphasizes the sharpness of the angle.
5. Less than 90 degrees: This phrase can be used to describe an acute angle, as it is the defining characteristic of this type of angle.
编辑总结:
锐角是指两条直线或者线段的夹角小于90度的角。它是三角形的一种类型,具有两条边都比直角小的特点。锐角在日常生活中经常出现,比如钟表上指针所形成的角、家具放置在墙角时遇到的问题等。同义词包括sharp angle、narrow angle、acute triangle等,它们都强调了锐角的特点。要注意与其他类型的三角形进行区分,以免混淆。