Geometry Chapter Vocabulary

___ is a part of a line that starts at an endpoint and extends forever in one direction

• polyhedron

• prism

• pyramid

• ray

Is an angle whose measure is greater than 0^o but less than 90^o

• acute angle

• adjacent angles

• angle

• angle bisector

To divide a segment or an angle into two congruent segments or angles.

• area

• bisect

• circumference

• collinear

A___ is a solid with a circular base connected by a curved surface to a single vertex

• complementary angles

• concave

• cone

• congruent angles

A polygon with all equal sides is an ____

• edges

• endpoint

• equiangular polygon

• equilateral polygon

The __ is the number of square units needed to cover a surface

• area

• bisect

• circumference

• collinear

Are two angles whose measures have a sum of 90°

• complementary angles

• concave

• cone

• congruent angles

A polygon where no diagonal contains points in the exterior of the polygon (all diagonals are completely inside the polygon)

• congruent segments

• convex

• coplanar

• cylinder

The segments where the faces of a polyhedron intersect are the _____

• edges

• endpoint

• equiangular polygon

• equilateral polygon

Is a figure formed by two rays, or sides, with a common endpoint called the vertex

• acute angle

• adjacent angles

• angle

• angle bisector