**3.**A polygon having four equal sides and four equal angles.**4.**is a solid figure bounded by six faces**8.**are defined as triangles with three unequal sides and three unequal angles.**12.**A plane curve everywhere equidistant from a given fixed point, the center.**14.**is a triangle in which one angle is a right angle (that is, a 90- degree angle).**15.**A quadrilateral with all four sides equal in length.

**1.**is the set of points that are all at the same distance r from a given point, but in three-dimensional space.**2.**is a triangle in which all three sides are equal.**5.**is a three-dimensional geometric shape that tapers smoothly from a flat base**6.**is a three dimensional shape with two round shapes at either end and two parallel lines connecting the round ends.**7.**is a figurate number that represents a pyramid with a base and four sides.**9.**A quadrilateral having no parallel sides**10.**A parallelogram having four right angles**11.**A four-sided plane figure with opposite sides parallel.**13.**is a solid that has two faces that are parallel and congruent.