Q: A scalene triangle is a regular polygon?

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If you mean a scalene triangle, then no. A regular polygon is defined as having equal angles. A scalene triangle has 3 different angles (and 3 different length sides).

If by regular, you're referring to a regular polygon which has all sides equal length, and all angles equal, then an equilateral triangle is a regular triangle. If you draw a scalene triangle or an isosceles triangle then it will not be equilateral.

triangle and a quadrilateril

A regular polygon is any polygon that has sides which are the same length and angles whose measures are equal. An equilateral triangle (also equiangular triangle) is a regular polygon. Other isosceles triangles (equilateral triangles are isosceles, but they are an exception) and scalene triangles are not regular polygons. A side note: Only in a triangle is a polygon regular solely if it is equilateral. (Since an equilateral triangle is equiangular as well). This is NOT always true in other polygons, like quadrilaterals, where it can be equilateral but not necessarily equiangular (a rhombus) or equiangular but not equilateral (a rectangle).

A scalene triangle.

Related questions

yes it is

If you mean a scalene triangle, then no. A regular polygon is defined as having equal angles. A scalene triangle has 3 different angles (and 3 different length sides).

No, a scalene triangle, for example, is a convex poygon but it is not regular.

The angle of rotation for a regular polygon with 7 sides isImmersive Reader

If by regular, you're referring to a regular polygon which has all sides equal length, and all angles equal, then an equilateral triangle is a regular triangle. If you draw a scalene triangle or an isosceles triangle then it will not be equilateral.

A scalene triangle is irregular. Only an equilateral triangle is regular.

triangle and a quadrilateril

Yes

A regular polygon is any polygon that has sides which are the same length and angles whose measures are equal. An equilateral triangle (also equiangular triangle) is a regular polygon. Other isosceles triangles (equilateral triangles are isosceles, but they are an exception) and scalene triangles are not regular polygons. A side note: Only in a triangle is a polygon regular solely if it is equilateral. (Since an equilateral triangle is equiangular as well). This is NOT always true in other polygons, like quadrilaterals, where it can be equilateral but not necessarily equiangular (a rhombus) or equiangular but not equilateral (a rectangle).

A triangle in general is just a polygon. An equilateral triangle is a regular polygon.

a circle and a scalene triangle.

a scalene triangle