Geometry Vocabulary

2. a line from the center of the circle to any point on the circle
7. a triangle with all the side lengths equal
9. two angles whose sum is 90 degrees
12. a part of the circumference of a circle
15. the distance around a circle
18. the shape formed when a plane slices through a solid
20. two lines that never meet and are always the same distance from each other
22. two lines that meet at a 90 degree angle
24. a flat surface that extends infinitely
25. a triangle with all side lengths unequal

1. a comparison of a length is a model to the corresponding length in the actual object
3. two angles whose sum is 180 degrees
4. an angle greater than 90 degrees but less than 180 degrees
5. half of a circle
6. a line through the center of a circle that touches 2 points on the circle
8. a line that doesn't pass through the center of the circle and touches 2 points on the circle
10. a plane figure with 5 sides
11. angles that share a common vertex and side, but have no common interior points
13. opposite angles formed when two lines intersect at a point
14. a line that intersects two or more lines
16. an angle less that 90 degrees
17. a quarter of a circle
19. a solid with a completely curved surface
21. a solid whose base is a polygon and the other faces are triangles that share a common vertex
23. having the same angle measure