acute angle |
an angle of less than ninety degrees. |
angle iron |
a piece of rolled iron or steel in the form of a right angle along its lengthwise dimension, used in construction for joining parts or as support. |
angle of incidence |
the angle that the line of movement of a body or of radiation, meeting a surface, makes with a line that is at right angles to the surface at the point of meeting. |
angle of repose |
the greatest angle of incline at which sand, stones, soil, or the like will not slide or roll downhill. |
at an angle |
slanted up or down; crooked. |
cerebellopontine angle |
a region of the brain between the pons and cerebellum where tumors frequently form. |
exterior angle |
any of the four angles formed outside of two parallel lines where they are intersected by a transverse line. (Cf. interior angle.) [2 definitions] |
interior angle |
any of the angles formed by a line that intersects two parallel lines. [2 definitions] |
oblique angle |
an angle that is not a right angle. |
obtuse angle |
an angle greater than 90 degrees and less than 180 degrees. |
right angle |
the angle formed where two perpendicular lines meet. It measures ninety degrees. |
solid angle |
an angle formed by three or more planes intersecting in a common point, or formed at the peak of a cone. |
straight angle |
an angle of 180 degrees. |
supplementary angle |
one of two angles that equal 180 degrees when added together. |
wide-angle lens |
a camera lens that covers an angle of view of forty-five degrees or more. |