Geometry Vocabulary

2. The total space occupied within the boundaries of a 3D figure.
3. The total areas of all surfaces on a 3D figure.
10. A 3D figure with a 2D base, and all other faces coming to a point. For example, a square _______ has a base of a square, with 4 sides coming up to a point.
11. A closed 2D figure with three sides and three interior angles with a sum of exactly 180 degrees.
12. Lines that intersect at an exact 90 degree angle.
14. The outer border of a circle.
15. The distance connecting the center of a circle to any point on the circumference (half the diameter).
16. Meaning equal, particularly with geometric figures or attributes of geometric figures.
17. A 3D figure with parallel, 2D bases. For example, a triangular ______ has parallel bases in the shape of a triangle.

1. An equation that is an established way to calculate something (for example, the _____ for area of a triangle is bh/2).
4. The 2D shape revealed after slicing through a 3D figure.
5. The tallest measurement in a figure, connecting to the base at a perpendicular angle.
6. A flat surface on a solid geometric figure.
7. The distance connecting two edges of a circle, passing directly through the center of the circle (double the radius).
8. Lines that run directly across from each other, never intersecting.
9. A closed 2D figure with four sides and four interior angles with a sum of exactly 360 degrees.
13. The total space occupied within the boundaries of a 2D figure, measured by unit squares.