A square has a perimeter of 12 units. One vertex is at the point left-parenthesis negative 1 comma 1 right-parenthesis, and another vertex is at the point left-parenthesis 2 comma 4 right-parenthesis. Which of the following points could be another vertex?

A. (1,2)
B. (2,1)
C. (1,-2)
D. (2,-1)
(You don't need to help but it would be nice)

9 answers

what are all those words? You clearly know how to write points in the choices. So why all the garbage up front? Try saying

A square has a perimeter of 12 units. One vertex is at the point (-1,1), and another vertex is at the point (2,4). Which of the following points could be another vertex?

Now, the line from (-1,1) to (2,4) has a slope of 1
So, the line from either point to another vertex must have a slope of -1.

Just check the choices to see which works.

A lot easier, though, is just to get out some graph paper and plot the two pints and all of the choices. It should be clear right away which is correct.
Ok oobleck thanks for the help i guess
These are the answers for the test.
1. A
2. C
3. A
4. C
5. C, D
6. C
7. B
8. A
9. A, C
10. A, C
Erin is correct!!!
Erin is correct
thks erin
Erin in correct thx a lot!!!
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OMG Erin thx so much!!!