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triangle in xy plane

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by alex.gellatly » Tue Jun 05, 2012 6:19 am
In the xy-plane, the vertices of a triangle have coordinates {0,0},{3,3}, and {7,0}. What is the perimeter of the triangle?

A. 13
B. srt34
C srt43
D 7+6srt2
E 12+3srt2

[spoiler]I got 10srt58, which is not in the ans choice. I got this by noticing it's a right triangle with side a=7, b=3, and then finding side c = srt58. Is this a bad question or am I way off track?[/spoiler]

Thanks...
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by 1947 » Tue Jun 05, 2012 7:21 am
alex.gellatly wrote:In the xy-plane, the vertices of a triangle have coordinates {0,0},{3,3}, and {7,0}. What is the perimeter of the triangle?

A. 13
B. srt34
C srt43
D 7+6srt2
E 12+3srt2

[spoiler]I got 10srt58, which is not in the ans choice. I got this by noticing it's a right triangle with side a=7, b=3, and then finding side c = srt58. Is this a bad question or am I way off track?[/spoiler]

Thanks...
distance between 0,0 and 3,3 is 3root2
00 and 7,0 is 7
3,3 and 7,0 is 5
so perimeter is 12+3root2
If my post helped you- let me know by pushing the thanks button. Thanks
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by Anurag@Gurome » Tue Jun 05, 2012 7:57 pm
alex.gellatly wrote:In the xy-plane, the vertices of a triangle have coordinates {0,0},{3,3}, and {7,0}. What is the perimeter of the triangle?

A. 13
B. srt34
C srt43
D 7+6srt2
E 12+3srt2

[spoiler]I got 10srt58, which is not in the ans choice. I got this by noticing it's a right triangle with side a=7, b=3, and then finding side c = srt58. Is this a bad question or am I way off track?[/spoiler]

Thanks...
Already discussed here: https://www.beatthegmat.com/triangle-in- ... 13706.html
Anurag Mairal, Ph.D., MBA
GMAT Expert, Admissions and Career Guidance
Gurome, Inc.
1-800-566-4043 (USA)

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