A certain right angle triangle has sides x,y,z where x<y<z. If the area of this triangular region is 1, which of the following indicates all possible values of y.
A) y < √2
B) √3/2<y<√2
C) √2/3<y<√3/2
D) √3/4<y<√2/3
E) y<√3/4
Thank you,
Prerna
Geometry question
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Here's one approach:A certain right triangle has sides of length x, y, and z, where x < y < z.lf the area of this triangular region is 1, which of the following indicates all of the possible values of y?
(A) y > √2
(B) √3/2 < y < √2
(C) √2/3 < y < √3/2
(D) √3/4 < y < √2/3
(E) y < √3/4
Since the triangle is a right triangle, the longest side will be the hypotenuse.
This means the side with length z is the hypotenuse, and the sides with lengths x and y are the legs.
Since the legs must meet at a right angle (since this is a right triangle), we can let one side (x or y) be the base of the triangle and the other side (x or y) can be the height.
We know that area = (base)(height)/2, and we're told the area of this particular triangle is 1.
So, we can conclude that (x)(y)/2 = 1
We can rewrite this as xy = 2
Now we also need to keep in mind that x < y
Given this, we could have x=0.1 and y=20, or we could have x=0.001 and y=2000, and so on.
As you can see, we can make y as large as we wish.
So, we can eliminate answer choices B, C, D and E since they all limit the upper value of y.
Answer = A
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Answer choice A should read as I've posted it below:
Let x=1 and y=2, so that the area of the triangle = (1/2)(1)(2) = 1.
Since it's possible that y=2, eliminate any answer choice that does not include y=2 in its range.
Eliminate B, C, D, and E.
The correct answer is A.
Plug in an easy triangle whose area is 1.A certain right angle triangle has sides x,y,z where x<y<z. If the area of this triangular region is 1, which of the following indicates all possible values of y.
A) y > √2
B) √3/2 < y < √2
C) √2/3 < y < √3/2
D) √3/4 < y < √2/3
E) y < √3/4
Let x=1 and y=2, so that the area of the triangle = (1/2)(1)(2) = 1.
Since it's possible that y=2, eliminate any answer choice that does not include y=2 in its range.
Eliminate B, C, D, and E.
The correct answer is A.
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Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.
As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.
For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3