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interior angle
noun
- an angle formed between parallel lines by a third line that intersects them.
- an angle formed within a polygon by two adjacent sides.
interior angle
noun
- an angle of a polygon contained between two adjacent sides
- any of the four angles made by a transversal that lie inside the region between the two intersected lines
interior angle
/ ĭn-tîr′ē-ər /
- Any of the four angles formed inside two straight lines when these lines are intersected by a third straight line.
- An angle formed by two adjacent sides of a polygon and included within the polygon.
- Compare exterior angle
Word History and Origins
Origin of interior angle1
Example Sentences
We learn that the interior angles of triangles add up to 180°.
I got the first cut, but again, when I started cutting the interior angle, the bar worked its way out of the jig, and the tool dug in and broke.
I think this is fascinating because it means that in other geometries, there are triangles that have different sums of interior angles!
Each interior angle of a regular heptagon is a bit over 128 degrees, so when we put three of them together at a vertex, we get more than 360 degrees.
Squinch, skwinch, n. a small stone arch, or series of arches, across an interior angle of a square tower to support the sides of an octagonal spire.
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