Geometry

3. a geometric element that has position but no extension
5. an ___ is formed by two rays that begin or end at the same point, and is measured in degrees
6. A quadrilateral having both pairs of opposite sides parallel to each othe
9. a pair of lines that never intersect
10. two objects are _____ if they have same shape and dimensions
14. a geometric term for "cut in half"
17. a 3 sided polygon
18. The line segment between two points on a given curve.
19. area of a triangle is 1/2 * ___* height
20. the point of intersection of lines or geometric shapes

1. an angle less than 90 degree
2. two shapes are _____if their only differnce is size
4. a measure for angles
7. a triangle with all equal sides
8. a collection of points which are equidistant from one common point called the center
11. A part of a line starting at a particular point and extending infinitely in one direction.
12. triangles in with each side is a different length
13. a ____ angle is n angle of 90 degree
15. closed segment of a differentiable curve in the two-dimensional plane
16. a flat surface on which a straight line joining any two points on it would wholly lie.