# Chapter 10

### SiSi R

## Chapter 10 Vocabulary

The length of any one of its sides.

Height of a Parallelogram-

The perpendicular distance between the base and the opposite side.

Bases of a Trapezoid-

A trapezoids two parallel sides.

Height of a Trapezoid-

The perpendicular distance between the bases.

Area-

Circle-

A round plane figure who's boundary (the circumference) consists of points from the center.

Radius-

A straight line from the center to the circumference of a circle or sphere.

Diameter-

Circumference-

The distance around a circle.

Pi-

The ratio of the circumference of a circle to it's diameter

Solid-

A three dimensional figure that encloses a part of space.

Polyhedron-

A solid that is enclosed by polygons.

Face-

Prism-

A solid, formed by polygons, that has two congruent bases lying in parallel planes.

Pyramid-

Cylinder-

Cone-

Sphere-

A solid formed by all points in space that are the same distance from a fixed point called the center.

Edge-

Vertex-

The endpoint of the rays that form an angle.

Net-

A model that you can cut and fold and lay out of a solid shape.

Surface Area-

The sum of the areas of the faces of the polyhedron.

Slant Height-

The diagonal distance from the apex of a right circular cone or a right regular pyramid to the base.

Volume-

The amount of space a solid occupies.