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March 13th, 2008, 12:57 PM   #1
Joined: Mar 2008
From: Texas

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Geometry review problems I didn't get

Number 5: The side lengths of a quadrilateral are 4:3:8:5. If the perimeter is 120 what is the longest side length?

Number 7: A 5"6 woman measured her shadeow at 13"9. Then she measured the shadow of the flagpole at 125 ft. How tall is the flagpole?

Number 10: The velocity of a plane is given by the vector <8,3>. To the nearest degree, what is its direction

Number 21: one leg of a right trianlge is 12 ft. The angle opposite the leg measures 25 degress. How long is the other leg

Number 23: Determine the value of x and y (It's a picture so I'll describe it)

Right triangle, adjacent leg = y, opposite leg = x, hypotenuse = 8
It is a 30, 60, 90 triangle.

Number 29: Jill can swim 6 miles per hour in still water. She tries to swim straight across a stream that has a current of 4 MPH. The dashed resultant vector is her path. Find the resultant vector.

That's all.
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March 13th, 2008, 07:12 PM   #2
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5. The side lengths are 4x, 3x, 8x, 5x (for some x), and their total, 20x, is 120, so x = 6 and the longest side length, 8x, is 48.

7. Since the woman's shadow is 2 1/2 times her height, the flagpole's shadow is likewise 2 1/2 times its height. Hence the flagpole is 50 ft tall.

10. The plane's bearing is given by arctan(8/3), which is 69° to the nearest degree.

21. The other leg is 12 cot(25°) ft, i.e., 25.7 ft (to 3 significant figures).

23. The shorter leg is 4 and the longer leg is 4√3.

29. Please describe the diagram and state what progress you have made with this easy question.
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March 13th, 2008, 08:03 PM   #3
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Unfortunately there is no picture for #29.

But maybe there was supposed to be, oh well.
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