Geometry Basic Vocab - 3rd grade

2D, closed shape with 4 sides and 4 right angles, and opposite angles that are equal

• pentagon

• vertex

• rectangle

• parallelogram

2D closed shape with 3 sides

• triangle

• geometry

• vertex

• hexagon

A point, corner, or angle

• square

• vertex

• rectangle

• parallelogram

Four equal sides and angles

• vertex

• square

• pentagon

• polygon

2D closed shape with 6 sides

• quadrilateral

• hexagon

• pentagon

• triangle

type of parallelogram where each pair of opposite sides are equal in length

• rhombus

• polygon

• parallelogram

• rectangle

any closed 4-sided shape

• square

• rhombus

• quadrilateral

• congruent

any 2D closed shape with straight sides and angles

• polygon

• triangle

• rhombus

• geometry

polygon with 2 pairs of parallel sides and not all sides are congruent

• rhombus

• hexagon

• parallelogram

• rectangle

a 2D shape with 5 sides

• hexagon

• pentagon

• triangle

• congruent