Across
- 1. A closed shape with three sides and angles. Can be isosceles, equilateral, scalene, right, obtuse, or acute.
- 8. A triangle with all angles less than 90 degrees. The sum of any two angles in this triangle is always greater than 90 degrees.
- 9. A triangle with one angle that equals 90 degrees and two acute angles. Can only have one angle equal to 90 degrees.
- 10. A rectangle with all sid s being equal length. All the angles are 90 degrees.
- 12. A polygon with four sides and angles. Consists of rhombuses, squares, and many more shapes.
- 14. A triangle with two equal sides. The angles opposite the equal sides are also the same.
- 18. How long something is. The longest side of a shape.
- 19. A two-dimensional shape with four sides. Opposite sides are parallel.
- 20. Two-dimensional shapes made of straight lines and are closed. Can be either regular or irregular.
Down
- 2. A flat shape where all the sides are the same length. The opposite angles are equal.
- 3. The measurement of a space. Can also be known as the size of a surface.
- 4. A triangle with three equal angles. It is always equilateral.
- 5. A type of triangle with three equal sides and three equal angles. Each angle is 60 degrees.
- 6. When sides are the exact same size and length. Angles are also considered this if they are the exact same size.
- 7. A quadrilateral that has opposite sides equal in length. The opposite angles are also parallel.
- 11. A triangle with three different side lengths. All the angles are different too.
- 13. The measure of a shape from side to side. In general, this is shorter than the length.
- 15. A triangle with one angle greater than 90 degrees and two acute angles. Can not have more than one angle greater than 90 degrees.
- 16. A closed shape that has one curved line and no straight lines. The same distance from the center at any point.
- 17. A four-sided shape with one pair of opposite equal sides. Can be acute, isosceles, have 3-sides equal, right, or even obtuse.