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Old 07-26-2007   #1
pathirajaruchi
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Hi,Can someone please help me. My daughter needs help with these geometry questions. I'm ashamed to say that i **** at geometry so any help that i can get will be much appreciated. 1)What is the area of a sector of a circle that has a diameter of 10 in. if the length of the arc is 10 in. ?a)25 sq inb)50 sq inc)75 sq ind)100 sq in2)In which one of the following figures is AB=AC?http://img254.imageshack.us/img254/7200/gfwa9.jpg3)The circumference of the circle in the following diagram is 128 ft. What is the length of AB?http://img516.imageshack.us/img516/1767/hgfrw6.jpga)16 ftb)22.5 ftc)45 ftd) 105.5 ft4)In the following diagram AE=2, CE=3, and DE=4.What is the length of BE?http://img340.imageshack.us/img340/2...5b)6c)8d)125)A sample of a plane geometric surface is the a)surface of a sphereb)side of a cylinderc)side of a boxd)side of a cone6)What is the angle supplementary to the angle measuring 165°12?a)14°48b)75°12c)180°d)60°7)I f two straight lines intersect and one angle is 30°, what are the other three angles?a)30°,90°,180°b)90°,90°,150 °c)30°,150°,150°d)90°,150°,150 8)The shortest distance from a point to a straight line isa)a parallel through the point to the lineb)the perpendicular from the line to the pointc)the perpendicular bisector of the lined)a vertical line through the point9)Find the angle complementary to the angle 80°25.a)9°35b)90°c)99°35d)180°10)Th rough what angle does the minute hand of a clock turn in 12 minutes of time?a)12°b)36°c)72°d)120°11)What is the total area of a covered box with a length of 4 ft, a width of 3 ft, and a height of 6 ft?a)38 sq ftb)84 sq ftc)96 sq ftd)108 sq ft12)A prism whose sides and faces are all congruent squares is a a)cubeb)parallelepipedc)pyramidd)frustm13)How would you find the volume of the solid in the following figure shown below?http://img174.imageshack.us/img174/4...94vn3.jpga)use the formula for the volume of a prismoidb)use the formula for the volume of a frustumc)you can find only an approximate volume of this figured)divide it into solids whose volumes you can find14)A right circular cylinder has a volume of 500 cu in.If the base has a radius of 4 in, what is the altitude of the cylinder?Round your answer to two decimal places.a)9.95 inb)19.79 inc)29.84 ind)31.25 in15)One advantage of the prismoidal formula is that you can use it toa)calculate precise volumes of all prismoidsb)calculate both volume and surface areac)determine volumes of figures that are not prismoidsd)estimate the volume of solids that are combinations of other solids.16)A sphere with a diameter of 16mm has the same surface area as the total surface area of a right cylinder with the base diameter equal to the sphere diameter.How high is the cylinder?a)8 mmb)14 mmc)16 mmd)18 mm17)The area formed by a plane cutting through a solid perpendicular to its axis is aa)longitudinal sectionb)cylindrical sectionc)cross sectiond)middle section
 
Old 07-26-2007   #2
picaresque_82
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Dude! This is a perfect example of ******* the hen who lays golden eggs instead of picking one egg a day.Too may questions at a go to answer
 
Old 07-26-2007   #3
cityboy516
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Wow a long one!1)a2)the last one (bottom right)3)a4)a5)c?6)a7)c8)b9)c10)c11)d12)a13)d14)a15 )a?16)a17)cSorry but there are too many questions to explain them all. Happy to explain any particular one that you wish.
 
Old 07-26-2007   #4
psbhowmick
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1) a2) right bottom [tangents drawn to a circle from the same point are equal in length]3) a4) b[Triangles AEC and DEB are similar triangles. So corresponding sides are proportional. So, AE/DE = CE/BE.]5) c6) a7) c8) b9) a10) c11) d12) a13) d14) a15) b16) c17) cTell if you need logic behind some other answers too. Specify the questions.
 
Old 07-26-2007   #5
lewis
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1) A.2) 4th one. lower right.3) A.4) B.5) C.6) A.7) C.8) B.9) A.10) C.11) D.12) A? congruent SQUARES?13) D14) A.15) B.16) C.17) C.Here are your answers, I'm going to become a senior in high school so don't solely depend on my answers. Most of them are right, I'm sure.
 
Old 07-26-2007   #6
garpit c
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Any More Problems? No? ok1)Circumfrence of a circle is pi(d) = 3.14(10) = 31.4 10 in. divided by this gives 31.84% Area of a circle is pi(r^2) = 3.14(5^2) = 78.5 So 31.84% of 78.5 is 25 sq in2) It doesn't look like any of the images are correct, since there is no way to tell where the points start or stop, but my guess would be the lower right one.3) A circle has 360 degress so 45 degrees is 12.5% 12.5% of 128 is 16 ft4) You can't figure this if you don't know for sure that the two lines are the same total length or if they both go through the center of the circle....if they do, then DE + CE = 7 so AE + BE must also equal 7. AE = 2 so BE is 55) Don't know but i would guess c since its the only one that's flat6) Supplementary angles add to equal 180 so 180-165 12' is 14 48'7) There are four angles formed, the angle opposite 30 is also 30. Since a straight line forms a 180 angle, 180-30=150, which would be the other two angles8) I don't get what this is asking9) Complementary angles add to 90 so 90-80 25' is 9 35'10) There are 60 minutes in a complete circle and 360 degrees. 12/60 is 20% so 20% of 360 is 72 degrees11) surface area? 6 sides - 2 are l*w, 2 are l*h, 2 are w*h 2(3)(4) + 2(3)(6) + 2(4)(6) = 10812) cube13) A prismawhat--? A fruwho--? Umm...d?14) pi(r^2)(h) = volume = 500 = 3.14(4^2)(h) solve for h = 9.9515) What?16) Who?17) How?
 
 

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