If a triangle is equiangular, does it have to be equilateral?

Evaluate the following expression 1/3^2

What is the multiple zero and multiplicity of f(x) = (x ? 3)(x ? 3)(x + 5)? multiple zero is 3; multiplicity is 2 multiple zero is 5; multiplicity is 1 multiple zero is ? 5; multiplicity is 1 multiple zero is ? 3; multiplicity is 2

Find the area of the regular hexagon if a side is 20 cm.