A regular triangle is a equalateral triangle. A regular triangle is one for which all sides are congruent and all interior angles ---- are congruent ---- ---- ---- ----
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A scalene triangle is irregular. Only an equilateral triangle is regular.
A triangle may or may not be a regular polygon. Let's look into things.First, a triangle is a polygon. All triangles are polygons. To be a regular polygon, the polygon must have equal sides. If the triangle has sides of equal length, then that triangle is an equilateral triangle and a regular polygon. If the triangle doesn't have sides of equal length, then it isn't a regular polygon. But in any case, the triangle is a polygon.
A triangle in general is just a polygon. An equilateral triangle is a regular polygon.
You get a regular triangle whose sides are double the length.
Only if it's an equilateral triangle.