Polygons

It is a closed plane figure made up of line segments that meet but do not cross.

It is a polygon with twelve sides and twelve angles.

It is a triangle with at least two sides that are equal.

It is a polygon with four sides and four angles.

It is a polygon with six sides and six angles.

• decagon

• hexagon

• heptagon

• pentagon

It is quadrilateral with opposite sides are parallel and equal.

• heptagon

• nonagon

• parallelogram

• scalene

It is a polygon with eleven sides and eleven angles.

• pentagon

• square

• trapezoid

• undecagon

It is a triangle with all angles are congruent.

• acute

• equiangular

• obtuse

• right

It is the number of sides and angles of nonagon.

It is the number of sides and angles of an octagon.