*at right angles/at a right angle (to the wall) （与墙）成直角. =>illusat angle 见angle插图. =>App
5 见附录5. `right-angledadj having/consisting of a right angle 有[成]直角的
*a right-angled triangle 直角三角形
* a right-angled bend in the road 道路上成90度的转弯.
an angle of 90°, like the angles at the corners of a square
at right angles (to sth)
if two things are at right angles, they make a 90° angle where they touch
Hold the brush at right angles to the surface.
a right-angled bend
1. Seen from this angle the woman in the picture is smiling. 从这个角度来看, 画中的女子面带微笑.
2. But the steepening angle or the decks increased. 但甲板的倾斜度仍在增加。
3. I wondered why he held his head motionless at an odd angle, as though he were in prayer. 当时我感到奇怪，为什么他的头一动不动地保持着一个古怪的角度，好像在祷告一样。