4-7+Coordinate+Proof+Midterm+Wiki

1) Given- A= (0,2), B=(5,8) Prove- Line AB has a slope of 4/5 As you can see, AB rises 4 and runs 5 from (0,0)

2) Given- A= (0,1), B= (1,0) C= (0,0), D= (1,1) Prove- Line AB is Perpendicular to Line CD Line AB has a slope -1 and Line CD has a slope of 1 because they have opposite slopes, line CD is perpendicular to line AB

3) Given- A= (1,0), B= (1,6), C= (7,0) Prove- Triangle ABC is isosceles

Triangle ABC is isosceles because segment AB is congruent to segment AC You can tell they are equal because B and C are both 6 away from A