Geometry 101

1234567891011121314151617181920
Across
  1. 3. Any number we can write as a decimal number. This is between 1.0 and 10.0, multiplied by a power of 10.
  2. 6. The sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse. Could also add up the two sides to get hypotenuse.
  3. 8. A triangle that has all three sides that are all the same length. Also, all three angles are the same size, too.
  4. 9. An acute angle triangle where all three interior angles are less than 90 degrees. A type of triangle with the angles and sides equal to each other.
  5. 12. A line perpendicular to a surface. Could also be perpendicular to another line considered as a base.
  6. 13. A type of transformation that takes each point in a figure and rotates it a certain number of degrees around a given point. This is a circular movement.
  7. 14. A triangle that has three unequal sides. The sum is still 180 degrees.
  8. 15. A triangle that measures less than 90 degrees. This is the smallest angle.
  9. 16. A line that goes from left to right across the page. It is also parallel to the x-axis.
  10. 18. The equation of a straight line in the form y = mx+b. 'M' is the slope of the line, and b is its y-intercept.
  11. 19. A triangle that measures more than 90 degrees. It is also less than 180 degrees.
  12. 20. Expression that gives the distance between pairs of points in terms of their coordinates. Measures how far two objects are.
Down
  1. 1. The longest side of a right triangle. It is opposite the right angle.
  2. 2. A type of transformation that takes each point in a figure and slides it the same distance in the same direction. An example could be "5 units right and 2 units up"
  3. 4. Two figures or objects that have the same shape or size. The measures and angles are identical.
  4. 5. A mirror image of a function or object over a given line in the plane. Can also be described as a "flip"
  5. 7. Lines on a plane that are always the same distance apart. This is no matter what direction.
  6. 10. The formula to find the center point of a straight line, using the coordinates of its endpoints. The middle of a line segment.
  7. 11. A triangle with at least two equal sides. The two sides are called legs.
  8. 17. Two lines that intersect at a right angle. The slopes are negative reciprocals of each other.