Topic 7 Vocabulary Crossword

4. A triangle where all three angles are less that 90 degrees.
9. A flat surface on a 3D shape.
13. A triangle with one right angle.
14. The total area added up of all faces of a shape.
17. Two lines that meet to form a right angle (90 degrees).
18. A math rule or equation used to find area of a given shape or to solve a problem.
19. A line where two faces meet on a 3D shape.
20. A four-sided shape with at least one pair of parallel sides.
21. The amount of space inside a shape, measured in square units.
22. A shape that has four equal side lengths with angles that may not be 90 degrees.

1. A triangle with all sides the same length and all angles equal.
2. A shape with four sides where opposite sides are parallel and equal.
3. A triangle with one angle greater than 90 degrees.
5. A quadrilateral with four sides that are all the same length and four right angles.
6. The bottom side of a shape or the side you measure from.
7. A point where two or more lines or edges meet.
8. The amount of space inside a 3D shape.
10. When a shape can be folded in half and both sides match, looks the same on both sides.
11. A polygon with four sides.
12. The distance from the base to the tope, measured straight up and down.
15. A quadrilateral with four sides and four right angle that is not a square.
16. A closed shape with straight sides.