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# Coordinates of a missing vertex

Given three of the vertices of a rectangle, can you find the fourth?

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• this is confusing how do you do it with out drawing the thing or do you need to
• I don't understand the question, but I'm gonna assume you mean thinking mentally. A wise teacher once said, "when in doubt, write it out." It's ok not to be able to think of it first inside our heads. Drawing the graph is optional, graph paper is easier to read.
• do you get confused of how the numbers are all the same that is confusing? but cool!
• Hi! I have a question: What exaclty is a vertex? Thanks, 990011389.
• In a (2-dimensional) polygon, a vertex is the intersection of two adjacent sides. Vertices can be thought of as corners.
Note that in any polygon, the number of sides equals the number of vertices.

Have a blessed, wonderful day!
• It's kind of confusing, but after 1,000,000,000,000 tries in the Practice: Area and perimeter on the coordinate plane, I finally get it now.

xd
• My estimate if you did 20 tries an hour, you are roughly 3700 years old. Even if you could do 1 try a minute, you would still be 1900 years old. So I guess this is just using the hyperbole of English.
(1 vote)
• Can we use systems of equations to solve this with a parallelogram?
• how and wut do i du wen i do dis
• This makes sense.
(1 vote)
• Is there an easier way to find the (x,y) coordinates? Other than graphing it and counting the numbers?
(1 vote)
• At , what are vertices?
(1 vote)
• Vertices are the points where two straight lines meet
(1 vote)
• what is a graph