| A | B |
|---|
| Any closed figure that has 4 sides. | quadrilateral |
| Any closed figure that has all straight sides. | polygon |
| any closed figured that has 3 sides. | triangle |
| any closed figure that has 8 sides. | octogon |
| any closed figure that has 4 equal sides and 4 right angles | square |
| any 4-sides figure that has 2 sets of parallel sides and 4 right angles. | rectangle |
| a 3-D shape that has 6 faces, 8 vertices, and 12 edges. | rectangluar prism |
| A 3-D shape that has 5 faces, 5 vertices, and 8 edges. | square pyramid |
| An angle that is exactly 90 degrees. | right angle |
| Any angle that is less than 90 degrees. | acute angle |
| Any angle that is more than 90 degrees. | obtuse angle. |
| When you add up the length of all the sides. | perimeter |
| length times width equals this | area |
