Algebra project thingy crossword (PS: some parts I learned from khan academy, and this is a geometry puzzle not a algebra 1 puzzle (it says in the instructions to make a geometry puzzle not an algebra 1 puzzle)

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Across
  1. 2. The formula for the area of a circle. (5 letters)
  2. 4. How to find the slope of a line when given two points on it
  3. 8. The graph of a quadratic function. (8 letters)
  4. 9. A transformation that slides a figure a certain distance in a given direction. (12 letters)
  5. 11. The term for the steepness of a line in the form y = mx + b. (5 letters)
  6. 12. The highest point of a parabola that opens downwards. (6 letters)
  7. 14. A transformation that flips a figure over a line. (9 letters)
  8. 15. the branch of mathematics concerned with the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs. (copied and pasted)
Down
  1. 1. Best Algebra teacher!
  2. 3. A number that cannot be written as a fraction.
  3. 5. A method for solving systems of equations by eliminating one variable
  4. 6. A part of a line that starts at one point and extends infinitely in one direction. (4 letters)
  5. 7. The point where the medians of a triangle intersect. (8 letters)
  6. 8. A quadrilateral with opposite sides parallel and equal. (13 letters)
  7. 10. The process of finding the value of an unknown variable in an equation. (8 letters)
  8. 13. The ratio of the circumference of a circle to its diameter. (2 letters)