Geometry

4. a flat surface of a 3D object
6. a solid object with 2 congruent and parallel bases
8. the surface included inside set lines
9. figures that have the same shape but are not necessarily the same size
11. an irrational number that is found by dividing a circle's circumference by its diameter
12. a closed solid that has 2 parallel usually curved bases connected by a curved surface
14. the ratio of 2 corresponding lengths in similar geometric shapes
15. area the sum of all of the areas of a 3D object's faces
16. a solid object with a polygon base and a vertex (point) at the the opposite end with triangular sides
18. a technique used to measure the height of an inaccessible object such as buildings or trees
19. the border or outer boundary of a 2 dimensional figure
20. a pattern made when the flat surfaces of a 3D object is laid our showing each face

1. the distance from the center to any point on the edge of a circle
2. the same shape and the same size
3. one of two parallel congruent sides of a 3D object
5. the distance through the center of the circle
7. the amount of space a 3D object fills
10. used to measure distances or lengths that are difficult to measure directly
11. a 3D shape that has flat surfaces and straight edges
13. the distance around a circle
17. the intersection of 2 faces this is a line