Vocabulary for Topic 7

5. A point where three or more or more edges meet
6. A segment formed by the intersection of two faces
8. A 3D figure with two parallel polygonal faces that are the same in size and shape
9. A 3D figure made of flat polygon-shaped surfaces called faces
14. The mathematical study of shapes and space
15. Lines that intersect to form right angles
17. A group of mathematical symbols that express a relationship
18. A polygon with three sides
20. A polygonal that does not connect to the vertex

1. A flat surface shaped like a polygon
2. A quadrilateral with both pairs of opposite sides parallel
3. A 2D pattern that you can fold to form a 3D figure
4. Breaking up a shape to form other shapes
7. The number of cubic units needed to fill a solid figure
10. A quadrilateral with two pairs of adjacent sides that are equal in length
11. A 3D figure with a base that is a polygon and triangular faces that meet at a vertex
12. A parallelogram with exactly one pair of parallel sides
13. A 3D figure is the sum of the areas of its faces
16. A parallelogram whose sides are all the same length
19. The number of square units the figure encloses