Across
- 1. a closed two dimensional shape with straight lines that do not cross each other
- 4. a quadrilateral that has two pairs of parallel sides
- 7. a polygon with three sides
- 8. one side of a triangle or parallelogram
Down
- 1. a line that crosses or meets another line at a 90 degree angle
- 2. a polygon that has four sides
- 3. units used to express area
- 5. each straight side of a polygon
- 6. the shortest distance between a base and its opposite side. it is always perpendicular to the base
- 7. a quadrilateral that has one pair of parallel sides
- 9. measures the inside space of a two-dimensional figure