Tra từ angas - Từ điển Oxford Learners Wordfinder Dictionary

see also LINE, CIRCLE, SHAPE
- the space between two lines or surfaces that meet: angle
- angles are measured in degrees
There are 360 degrees in one complete turn. ◎ Line ab is at an angle of 45※° to line bc.
- an angle of 90※°: right angle
- an angle of less than 90※°: acute angle
- an angle between 90※° and 180※°: obtuse angle
- an angle of more than 180※°: reflex angle
- if there is an angle of 90※° between two lines or two things, one line or thing is at right angles (to the other), at a right angle (to the other), perpendicular (to the other)
The legs on a table are at right angles to the top of the table.
- something which goes straight up from the ground or from a line at an angle of 90※° is vertical
a vertical line ◎ a sweatshirt with vertical stripes
- something which is not straight up is at an angle (to sth)
The nail was sticking out of the wood at an angle.
- an instrument in the shape of a half circle used for drawing and measuring angles: protractor
- an instrument used for drawing straight lines and angles of 90※°, 60※°, 45※° and 30※°: set square
- the area of mathematics concerned with angles, lines, shapes, etc: geometry (noun U)
- the area of mathematics concerned with the angles and sides of triangles: trigonometry (noun U)
※ more on mathematics MATHEMATICS