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x or y
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25 Sep 2018, 04:04
25 Sep 2018, 04:04
1
Expert Reply
00:00
Question Stats:
72% (00:51) correct
27% (01:04) wrong based on 61 sessions
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Attachment:
rhombus.jpg [ 9.98 KiB | Viewed 3118 times ]
Quantity A |
Quantity B |
x |
y |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Re: x or y
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17 Oct 2018, 23:43
17 Oct 2018, 23:43
1
Expert Reply
Carcass wrote:
Attachment:
rhombus.jpg
Quantity A |
Quantity B |
x |
y |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Both the triangle are right angled triangle with a common side say 1..
Now the triangle with hypotenuse X is 45°-45°-90° and sides will be 1:1:√2, so X=√2
the triangle with hypotenuse y is 30°-60°-90° and sides will be 1:√3:2 and 1 is opposite 30°, so y=2
Hence y>X
Thus B
Re: x or y
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25 Nov 2018, 14:11
25 Nov 2018, 14:11
Answer: B
We call the shared edge of two rectangles as H
In left rectangle we degrees of angles are 90, 45, 45
sin45 = H / x
√2/2 = H / x
H = √2/2 * x
In right rectangle we degrees of angles are 90, 30, 60
Sin30 = H / y
1/2 = H / y
H = 1/2 * y
So we have H = √2/2 * x and H = 1/2 * y
H = √2/2 * x = 1/2 * y
We multiply both sides to 2, then we will have :
√2 * x = y
Now we see that y is bigger than x because y/x = √2 (√2 which divides y to x, is more than 1, so y is bigger than x)
B is bigger
We call the shared edge of two rectangles as H
In left rectangle we degrees of angles are 90, 45, 45
sin45 = H / x
√2/2 = H / x
H = √2/2 * x
In right rectangle we degrees of angles are 90, 30, 60
Sin30 = H / y
1/2 = H / y
H = 1/2 * y
So we have H = √2/2 * x and H = 1/2 * y
H = √2/2 * x = 1/2 * y
We multiply both sides to 2, then we will have :
√2 * x = y
Now we see that y is bigger than x because y/x = √2 (√2 which divides y to x, is more than 1, so y is bigger than x)
B is bigger
