What's the surface area of this shape???

Can you draw an isosceles triangle with only one 80 degree angle?

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

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180