Construction Geometry

[Njabs]

Today in class we were learning about "Equidistance, relationships between points and lines, basic constructions" lecturer gave us a task to construct a line that is equidistant from line segments AB and CD. These two line segments, AB and CD were NOT lying parallel, they were sort of skewed, line AB on A endpoint slightly tilted down towards endpoint C. I simply constructed a line segment between these line segments by bisecting them, he said that is rubbish and threw our stuff on dustbin. Kindly tell me how was I supposed solve this problem. Thanks everyone!

 

[Bob Brown MSEE]

Today in class we were learning about "Equidistance, relationships between points and lines, basic constructions" lecturer gave us a task to construct a line that is equidistant from line segments AB and CD. These two line segments, AB and CD were NOT lying parallel, they were sort of skewed, line AB on A endpoint slightly tilted down towards endpoint C. I simply constructed a line segment between these line segments by bisecting them, he said that is rubbish and threw our stuff on dustbin. Kindly tell me how was I supposed solve this problem. Thanks everyone!

I would extend AB and CD until they meet -- then bisect the angle you created.

 

[lookagain]

Today in class we were learning about "Equidistance, relationships between points and lines, basic constructions"
lecturer gave us a task to construct a line that is equidistant from line segments AB and CD. These two line segments, AB and CD were NOT lying
parallel, they were sort of skewed, line AB on A endpoint slightly tilted down towards endpoint C. I simply constructed a line segment between
these line segments by bisecting them, he said that is rubbish and threw our stuff on dustbin. Kindly tell me how was I supposed solve this problem.
Thanks everyone!

I want your class to get your instructor reprimanded for acting out of line toward the class.
That's abusive behavior. Did anyone video it? I would get your parents involved if this is a
high school course.

Edit: Suppose line segment AB is a leg of a trapezoid, with point A oriented at the top left of the diagram,
and line segment CD is a leg of the same trapezoid, with point B oriented at the top right of the diagram.

Construct the midpoints of AC and BD. Then connect those midpoints using a pencil and a straight edge.

 

[Njabs]

Many thanks

I want your class to get your instructor reprimanded for acting out of line toward the class.
That's abusive behavior. Did anyone video it? I would get your parents involved if this is a
high school course.

Edit: Suppose line segment AB is a leg of a trapezoid, with point A oriented at the top left of the diagram,
and line segment CD is a leg of the same trapezoid, with point B oriented at the top right of the diagram.

Construct the midpoints of AC and BD. Then connect those midpoints using a pencil and a straight edge.

To Bob and Lookagain, thank you guys, I''ll follow your advice. No we did not videorise it, I guess we are afraid you know in my country I am sorry to say it we still have a lot of issues, including Education if you know what I mean. Please keep helping us, you guys are GREAT! God bless!!

 

[Njabs]

Will Give Feedback

I want your class to get your instructor reprimanded for acting out of line toward the class.
That's abusive behavior. Did anyone video it? I would get your parents involved if this is a
high school course.

Edit: Suppose line segment AB is a leg of a trapezoid, with point A oriented at the top left of the diagram,
and line segment CD is a leg of the same trapezoid, with point B oriented at the top right of the diagram.

Construct the midpoints of AC and BD. Then connect those midpoints using a pencil and a straight edge.

I cannot thank you guys enough for taking the trouble to assist me, I'' follow your advice and let you know of the outcome. It's a pity our lecturer can be pigheaded sometimes, I''ll give it to one of my fellow-student to go ask him what he thinks. All the best!

 

[Bob Brown MSEE]

I want your class to get your instructor reprimanded for acting out of line toward the class.
That's abusive behavior. Did anyone video it? I would get your parents involved if this is a
high school course.

Edit: Suppose line segment AB is a leg of a trapezoid, with point A oriented at the top left of the diagram,
and line segment CD is a leg of the same trapezoid, with point B oriented at the top right of the diagram.

Construct the midpoints of AC and BD. Then connect those midpoints using a pencil and a straight edge.

If AB and CD are not legs of the same trapezoid, this will not work. I didn't see anything in the given to allow us to assume the special case of trapezoid.

 

[Njabs]

Wow!!

If AB and CD are not legs of the same trapezoid, this will not work. I didn't see anything in the given to allow us to assume the special case of trapezoid.

View attachment 3940

Bob Brown MSEE you are the man! Thank you! Thank you!! This has worked!! Big up!!