Geometry terms crossword

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Across
  1. 1. Two angles that measure up to 180. They can be next to each other or separate too.
  2. 4. puzzle:
  3. 5. angle- A flat line stretching across two places without bending. It measures exactly 180 degrees.
  4. 8. A theorem in which if two angles and the side between them match on both triangles, they are congruent. It proves triangles are the same shape and size.
  5. 12. A polygon with 4 sides and four angles. All the exterior angles add up to 360.
  6. 13. A flat surface that extends infinitely in all directions. It is 2-dimensional, meaning it has length and width.
  7. 14. Are the same shape and size. Their corresponding sides and angles are equal.
  8. 15. Segment- Part of a line with 2 endpoints. It has a clear starting and ending point.
  9. 16. bisector- A line, ray, or segment that cuts a segment in two equal parts. It goes through the midpoint of the segment
  10. 18. A quadrilateral with two pairs of side by side angles that are the same length. One pair of opposite equal angles.
  11. 19. addition postulate- Helps in solving problems in which angles are divided into smaller parts. It states that if a point lies inside an angle, the measure of the whole angle is the sum of the two smaller angles formed.
Down
  1. 1. A polygon in which all the sides are the same. All of the angles measure 90 degrees.
  2. 2. This intersects at right angles. This always adds up to 90 degrees.
  3. 3. A triangle in which all 3 angles are equal. Each measure adds up to 60 degrees.
  4. 6. A triangle with two equal sides. The angles that are opposite from the equal sides are also equal.
  5. 7. A line that has one endpoint and extends infinitely in one direction. Named using the endpoint first, then the other point.
  6. 9. angle- An angle that is less than 90 degrees. Smaller than a right angle
  7. 10. theorem- In a right triangle, the sum of the two legs squared should equal the hypotenuse squared. Helps you figure out how far apart two points are when you make a right triangle with them.
  8. 11. 3 sided polygon with 3 angles. The sum of the interior angles is 180.
  9. 17. Formula- Used to find the distance between two points. Uses the difference in X and Y positions to see how far two points are.