An equilateral is easier because it has 3 equal sides
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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.
You cannot. An equilateral triangle has 3 lines of symmetry, an isosceles has one and a scalene none. So there is no triangle with two lines of symmetry. Of course, you could draw only two of the three possible lines of symmetry for an equilateral triangle.
A scalene triangle's three sides are all unequal to each other. To draw a scalene triangle, one needs a ruler to measure the lines and make sure that none of the triangle's sides are equal to each other.
Yes, because an equilateral triangle is always acute.
Yes. Scalene simply means that a triangle's sides are all different lengths. Obtuse means that a triangle has an obtuse angle. Therefore, you can have an obtuse scalene triangle.