See the link. Alternatively, just use a straight edge and protractor, and make each interior angle 60 degrees (the side lengths will automatically be equal). Draw the base line with a straight edge, marking the desired length of the base. Adjust your compass to match the length of the base. From each end of the base, use the compass to swing an arc to the side you want the vertex. The intersection of the arcs marks the vertex; using the straightedge, draw the remaining two sides, connecting the vertex to both ends of the base line.
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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.