Answer:
three sides
at least two sides of the same length
closed figure
Step-by-step explanation:
1) A triangle is a polygon.
2) Isoceles triangles have 2 equal angles.
3) A triangle has 3 sides
4) An isoceles triangle has 2 acute and 1 obtuse angle
5) An isoceles triangle means to have 2 sides of equal length.
6) A triangle is a closed figure.
