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Geometry/straight line

Question
hello.

a point is a point, but is two points connected a straight line?

Yes, it takes two points to determine a line.  But, two points can also be a part of line segments and rays.  If both points are endpoints, you have a line segment.  A ray has one end point and continues infinitely in one direction (think of a ray of light from a flashlight or the sun).  A line goes infinitely in both directions.

Check out http://euler.slu.edu/escher/index.php/Points,_Lines,_Segments,_Angles_etc. for examples.

I hope this helps :)

Geometry

Volunteer

Anne Losch

Expertise

I cannot answer questions about non-Euclidean geometry (that has been a while). I can answer trigonometry, coordinate geometry, proofs, algebraic geometry, transformations, constructions, 3d shapes, area, perimeter, points, lines, planes, angles (adjacent, vertical, ...), parallel and perpendicular lines, polygons, circles, and anything taught in a geometry class.

Experience

I have two years teaching experience in geometry; many years tutoring Geometry.

Organizations
NEA, past NCTM, MAA, AMS, and ASCD

Education/Credentials
I have a B.S. in mathematics (and computer science), and went back for my teaching certificate (with more than enough hours for a minor in education).

Past/Present Clients
Past tutoring at Sylvan Learning Center, Huntington Learning Center, and private tutor. I have responded to questions on answers.com but would prefer to volunteer with All Experts.