## RH 2 years ago Please help! :( The coordinates of the midpoints of the sides of a triangle are A(0, 1), B(4, 0), and C(2, –2). Find the coordinates of the vertices of the triangle. Hint: You should plot out this problem using graph paper! A. (–2, 1); (2, 3); (6, –2) B. (–2, –1); (–2, 3); (5, –3) C. (–2, –2); (0, 3); (0, –1) D. (–2, –1); (2, 3); (6, –3)

1. syhna

all i know is trial and error using the midpoint formula on each choices ...

2. RH

@syhna you suggest trying every choice?

3. syhna

well you dont really have to make an effort, you'll see it through the coordinates

4. syhna

look, for example if you'll examine letter A , the y coordinate of one of its midpoint should be 2... there's no positive 2 y coordinate in the given midpoints

5. RH

|dw:1364252727030:dw|

6. RH

I have plotted the points

7. RH

@syhna

8. syhna

what points are those? the midpoints?

9. RH

The points that are given to plot, what should I do now? :(

10. syhna

try this.. you are using a graphing paper right? try to double the length of the sides...

11. syhna

oh no i dont think that'll work sorry

12. RH

@syhna :( oh ok then

13. syhna

but the answer is d.. i guess... wait ill think of a possible solution

14. RH

@syhna thank you so much anyway for your time and participation! it means a lot

15. syhna

the midpoint formula is (x + xsub1) / 2 and (y + ysub1)/2 right?

16. RH

yes

17. syhna

T.T i cant think of anything

18. RH

@syhna Don't worry about it! No problem! Thanks a lot for trying :)