4- Parallel, Perpendicular, & Coinciding

Question 1

What are coinciding lines?

Answer 1

• lines with infinitely many points in common

- SAME slope & SAME y-intercept

Question 2

What are perpendicular lines?

Answer 2

geometry definition:
meet at right (90 degree angles)
algebra definition:
have OPPOSITE RECIPROCAL slopes

Question 3

What are parallel lines?

Answer 3

geometry definition:
coplanar lines that never intersect
algebra definition:
SAME slope, but DIFFERENT y-intercepts