直角的英文
[数学] right angle
◇直角尺 square; try square; bare l-square; 直角棱镜 [光学] right-angle prism; corner cube prism; rectangular prism; 直角三角形 right angled triangle; right triangle
◇直角尺 square; try square; bare l-square; 直角棱镜 [光学] right-angle prism; corner cube prism; rectangular prism; 直角三角形 right angled triangle; right triangle
例句与用法
更多例句: 上一页 下一页- The upper and lower jaws possess straight tooth rows and the jaw arches are almost rectangular in shape .
上、下颌具有直的齿列,而颌弓几乎呈直角形。 - The two vanes are at right angles in plan, and each is either all shaded or all in sunlight .
上、下两块觇板在一平面图上相交成直角,每块觇板全是阴暗的,或全被阳光照射。 - Bisecting that at right angles , is lundy on that side
平分那个直角,朗迪在这边 - Right angle parting - off tools with high speed steel tips
带高速钢刀头直角切断刀 - A square has four equal sides and four right angles
正方形有四条等边和四个直角
百科释义
在几何学和三角学中,直角,又称正角,是角度为90度的角。它相对于四分之一个圆周(即四分之一个圆形),因为把圆周对应的圆心角划分为360度,所以直角等于90度,而两个直角便等于一个平角(180°)。
详细百科解释