Recent content by cenglish

  1. C

    Need help writing a coordinate proof

    I got: The midpoint of Line AB is (a,0). The slope of Line CM is undefined and the slope of Line AB is 0. Therefore, Line AB is perpendicular to Line CM.
  2. C

    Need help writing a coordinate proof

    Question: Triangle ABC is a right isosceles triangle with hypotenuse AB. M is the midpoint of Line AB. Write a coordinate proof to prove that Line CM is perpendicular to Line AB.
  3. C

    High School How to Construct a Decagon Using a Protractor and Compass

    Yes, I do use the plastic protractor that is provided for me at my school. Would you suggest going out and buying one of my own?
  4. C

    High School How to Construct a Decagon Using a Protractor and Compass

    Hi guys, I have been working for a long time and have attempted to construct a decagon but have failed all three times. I know that all the external angles are 144 degrees and they all add up to 1440 degrees. Every time I draw the decagon I come up with a hendecagon. I don't know why I come up...