Well, you could make triangles and measure them with a ruler. Make sure they are ALL THE SAME LENGTH.
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Yes, because an equilateral triangle is always acute.
no
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.
Yes either an isosceles triangle or an equilateral triangle
Yes because the measure of each angle in an equilateral triangle is 60 degrees which is an acute angle.