Geometry Vocabulary

The surface a solid object stands on, or the bottom line of a shape such as a triangle or rectangle.

• Lateral Face

• Pyramid

• Scalene Triangle

• Base

A polygon with 7 sides and 7 angles.

• Hexagon

• Septagon

• Heptagon

• Sevagon

Any surface of a polyhedron other than a base.

• Base

• Unit Cube

• Congruent Angle

• Lateral Face

A ploygon with nine sides and nine angles.

• Nonagon

• Nanagon

• Optigon

• Heptagon

A solid figure that has two congruent polygon-shaped bases, and other faces that are all rectangles.

• Pyramid

• Prism

• 3-Dimensional Object

• Unit Cube

Any polygon with four sides and four angles.

• Quadrilateral

• Square

• Rectangle

• Cube

A polygon in which all sides are congruent.

• Polygon

• Regular Polygon

• Irregular Polygon

• Conagon

The measure of the space that a solid figure occupies.

• Mass

• Volume

• Area

• Perimeter

What is a closed plane figure made up of line segments?

•  Polygon

• Irregular Polygon

• Circle

• Shape

What has sides of equal length and angles of equal measure?

• Irregular Polygon

• Shapes

• Circles

• Regular Polygon