Geometry crossword book

3. a line connecting the midpoints between two sides of a triangle
4. A shape with 8 sides
6. a four-sided plane rectilinear figure with opposite sides parallel
9. a quadrilateral with four sides and four vertices
10. The middle
11. a figure which is formed by two rays or lines that shares a common endpoint
13. when both the hypothesis and conclusion are negated
14. the perpendicular drawn from the vertex of the triangle to the opposite side
17. a closed two-dimensional polygon with six sides
18. The distance around a shape
19. the amount of space occupied by a two-dimensional figure
20. an angle of exactly 90 degrees

1. an angle whose vertex point has a value of 180 degrees
2. the centre point of the object
5. a statement that is assumed to be true based on basic geometric principles.
7. Two or more lines that lie in the same plane and never intersect each other
8. two lines that meet or intersect each other at right angles
12. a pair of adjacent supplementary angle
15. An angle which is measuring less than 90 degrees
16. The converse of a conditional statement is created when the hypothesis and conclusion are reversed.