##### Across

**3.**non coplanar. Lines that are not parallel, and they do not intersect.**6.**a parallelogram with 4 congruent sides, and 4 right angles.**7.**a flat surface, and has no thickness. Can be named by a capital letter.**12.**multiplying both sides of a/b=c/d, ad=bc.**13.**A statement of equality between two ratios. a/b = c/d**14.**a quadrilateral with both pairs of opposite sides equal.**16.**a conclusion. Based on inductive reasoning.**17.**A parallelogram with 4 right angles.**19.**coplanar. Lines that do not intersect.

##### Down

**1.**a quadrilateral with 2 pairs of adjacent sides.**2.**a comparison of two quantities.**4.**when 3 or more ratios are equivalent.**5.**Nonparallel opposite sides are congruent.**8.**Based on patterns you observe.**9.**divides a segment into two congruent segments.**10.**a quadrilateral with exactly 1 pair of parallel sides.**11.**angles of a polygon that share a side.**15.**a parallelogram with 4 congruent sides.**18.**a part of a line with one endpoint. Named by two capital letters.**20.**a series of points that extend indefinitely. Can go in either direction, named using only two points.