A trapezoid has consecutive sides that measure x, 2x, 3x, and 2x. If one of the angles of the trapezoid measures 60 degrees, what is the area of the trapezoid in terms of x?
Answer Choices:
A. 2x^2 (2^(1/2))
B. 3x^2 (2^(1/2))
C. 2x^2 (3^(1/2))
D. 3x^2 (3^(1/2))
E. 4x^2 (3^(1/2))
OA is C
Expert please help
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- ilovemgmat
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"Whoever one is, and wherever one is, one is always in the wrong if one is rude." ~Maurice Baring
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Area of trapezoid -ilovemgmat wrote:A trapezoid has consecutive sides that measure x, 2x, 3x, and 2x. If one of the angles of the trapezoid measures 60 degrees, what is the area of the trapezoid in terms of x?
Answer Choices:
A. 2x^2 (2^(1/2))
B. 3x^2 (2^(1/2))
C. 2x^2 (3^(1/2))
D. 3x^2 (3^(1/2))
E. 4x^2 (3^(1/2))
OA is C
(1/2)*(sum of parallel sides)*(height).
Here,
sum of parallel sides = (x+3x)=4x
height =
sin 60 = 3^(1/2) = h/2x
so, h = x3^(1/2)
so area = (1/2)*x3^(1/2)*4x= 2x^2(3^(1/2))
so, answers is C
- ilovemgmat
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Do we always start from the top when the problem says four consecutive sides? Thank you for the explanation: it helped!
nimish wrote:Area of trapezoid -ilovemgmat wrote:A trapezoid has consecutive sides that measure x, 2x, 3x, and 2x. If one of the angles of the trapezoid measures 60 degrees, what is the area of the trapezoid in terms of x?
Answer Choices:
A. 2x^2 (2^(1/2))
B. 3x^2 (2^(1/2))
C. 2x^2 (3^(1/2))
D. 3x^2 (3^(1/2))
E. 4x^2 (3^(1/2))
OA is C
(1/2)*(sum of parallel sides)*(height).
Here,
sum of parallel sides = (x+3x)=4x
height =
sin 60 = 3^(1/2) = h/2x
so, h = x3^(1/2)
so area = (1/2)*x3^(1/2)*4x= 2x^2(3^(1/2))
so, answers is C
"Whoever one is, and wherever one is, one is always in the wrong if one is rude." ~Maurice Baring
Rudeness and sarcasm won't be entertained!
Rudeness and sarcasm won't be entertained!
- sl750
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Trigonometry is not necessary to solve this problem. Since, it is specified that this is an isosceles Trapezoid. The legs of the Trapezoid are of the same length (2x).
Area of the Trapezoid = Area of Right Triangle 1+Area of Rectangle+Area of Right Triangle 2
Area of Right Triangle1 = Area of Right Triangle 2 = 1/2*x*sqrt(3)*x. You can use the 30-60-90 rule to find the height of the Triangle
Area of the Rectangle = x*sqrt(3)*x
Sum the results = 2*x^2*sqrt(3)
Area of the Trapezoid = Area of Right Triangle 1+Area of Rectangle+Area of Right Triangle 2
Area of Right Triangle1 = Area of Right Triangle 2 = 1/2*x*sqrt(3)*x. You can use the 30-60-90 rule to find the height of the Triangle
Area of the Rectangle = x*sqrt(3)*x
Sum the results = 2*x^2*sqrt(3)