# exterior angle

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exterior angle
Angles 1, 2, 7, and 8 are exterior angles.

## exterior angle

n.
1. The angle between any side of a polygon and an extended adjacent side.
2. Any of the four angles that do not include a region of the space between two lines intersected by a transversal.

## exterior angle

n
1. (Mathematics) an angle of a polygon contained between one side extended and the adjacent side
2. (Mathematics) any of the four angles made by a transversal that are outside the region between the two intersected lines

## exte′rior an′gle

n.
1. an angle formed outside parallel lines by a third line that intersects them.
2. an angle formed outside a polygon by one side and an extension of an adjacent side; the supplement of an interior angle of the polygon.
[1885–90]
exterior angles
Angles 1, 2, 7, and 8 are exterior angles. Angles 1 and 8 and angles 2 and 7 are alternate exterior angles.

## ex·te·ri·or angle

(ĭk-stîr′ē-ər)
The angle formed between a side of a polygon and an extended adjacent side. Compare interior angle.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 exterior angle - the supplement of an interior angle of a polygonexternal angleangle - the space between two lines or planes that intersect; the inclination of one line to another; measured in degrees or radianship - (architecture) the exterior angle formed by the junction of a sloping side and a sloping end of a roof
Translations

## exterior angle

n (Math) → Außenwinkel m
References in periodicals archive ?
In the case where consideration of the problem is not feasible as a whole, then different elements of this problem and its solutions can be used for studying and repetition of the following concepts and skills: the sine rule, the cosine rule, applications of the derivative, the arithmetic mean and geometric mean, the tangent and the secant, the exterior angle of a triangle, the inscribed angle, and others (ACARA, 2012).
I checked the exterior angle of a cyclic quadrilateral and found that it did not equal the interior opposite angle.
Initially, they defined it as a figure made with two half lines, but they were not satisfied with this definition because it was not clear whether the definition referred to interior angle or exterior angle (see Figure 2).

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