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April 16, 2014

April 16, 2014

**Recent Homework Questions About Geometry**

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**Geometry, Help**

just use the distance formula: d = √(∆x^2 + ∆y^2) for #2, that would be d = √((8-(-2))^2 + (-6-(-2))^2) = √(10^2 + (-4)^2) = √116 = 2√29
*Tuesday, August 20, 2013 at 12:31pm*

**Geometry, Help**

Help? I'm stuck. For each graph, find (a)AB to the nearest tenth and (b)the coordinates of the midpoint of AB. 1. Coordinates are A(-9, -6) B(6,6) 2.A(-2,-2) B(8,-6) 3. A(0,3) B(-2,-2)
*Tuesday, August 20, 2013 at 12:20pm*

**solid mensuration**

no solid mensuration here. Just regular plane geometry. The area of an ellipse with semi-axes a and b is πab. Note that if a=b, we have a circle of radius a, and area πa^2
*Tuesday, August 20, 2013 at 12:18am*

**Geometry, Help**

√n is a positive value So, √(a^2+b^2) is a positive value There is no "midpoint" of two points in the plane. There is, however, the midpoint of the line segment joining the two points. That will turn out to be the center of the circle which has the two ...
*Tuesday, August 20, 2013 at 12:10am*

**math - geometry**

Plot the center at (4,-7) Plot the horizontal and vertical diameter endpoints, 8 units from the center. Sketch a circular curve using those points. Much easier with a compass :-)
*Tuesday, August 20, 2013 at 12:08am*

**Geometry, Help**

1. Reasoning How does the Distance Formula ensure that the distance between two different points is positive? 2. There are two different formulas for midpoint. Is it possible to use the formula for midpoint "on a number line" when you are trying to find the midpoint...
*Monday, August 19, 2013 at 9:46pm*

**math - geometry**

Austin wants to sketch the graph of a circle represented by the given equation. (x - 4)2 + (y + 7)2 = 64 Using complete sentences, describe the steps used to sketch the circle on a coordinate grid
*Monday, August 19, 2013 at 9:39pm*

**geometry**

Suppose ABCD is a trapezoid with parallel sides AB and CD that has four points E,F,G and H tangent to the inscribed circle Γ on sides AB,BC,CD, and AD, respectively. If AE=2,BE=3, and the radius of Γ is 12, what is the length of CD?
*Monday, August 19, 2013 at 5:12pm*

**geometry**

Geometrically, I have no idea. Algebraically, if we let A = (0,0) B = (1,0) then D = (1,√3) X = (1,-1) so M = (1,(√3-1)/2) C = (3/2,√3/2) slope of MC is 1 slope of MD is √3/2 ∠CMD = 60°-45° = 15° Maybe by working with all those 60°...
*Monday, August 19, 2013 at 1:59pm*

**geometry**

ABCDEF is a regular hexagon. Square ABXY is constructed on the outside of the hexagon. Let M be the midpoint of DX. What is the measure (in degrees) of ∠CMD?
*Monday, August 19, 2013 at 11:56am*

**Math Geometry**

Starting from the point (0,0), a grasshopper makes a series of leaps on the coordinate plane. The grasshopper's first leap takes her to (3,4). After a move which adds (x,y) to the grasshopper's coordinates, her next move adds either (x,y-1) or (x-1,y) to her ...
*Sunday, August 18, 2013 at 12:54pm*

**geometry**

i dont know!!!
*Saturday, August 17, 2013 at 8:59pm*

**ap geometry**

JM=MK=JK/2 x/8 = (3x/4-6)/2 x/8 = (3X/4-24/4)/2 x/8 = 3x/8 - 24/8 x = 3x - 24 x-3x = -24 -2x = -24 x = 12 12/8 = 1.5 = JM = MK
*Saturday, August 17, 2013 at 5:19pm*

**geometry**

the altitude times the side length: Area = altitude × s A = 0.9 * 1.2 A = ________ square meters
*Friday, August 16, 2013 at 3:32pm*

**geometry**

find the area of the rhombus (0.9m and 1.2m
*Friday, August 16, 2013 at 3:12pm*

**Geometry**

Thanks Steve. I got it. Forgot to convert feet to miles when calculating.
*Friday, August 16, 2013 at 5:40am*

**Geometry**

If you draw a triangle where the hypotenuse is r+h (the elevated observation point), and the distance to the horizon is d, then r^2+d^2 = (r+h)^2
*Friday, August 16, 2013 at 4:09am*

**Geometry**

A person standing h feet above sea level can seecd miles to the horizon. The distance r is the radius of the earth = 3963 miles. d is the tangent to the circle forming a right angle to the radius. h + r is the tangent. Solve using Pythagorean theorem and secant-tangent theorem...
*Thursday, August 15, 2013 at 11:33pm*

**Geometry**

Thatsall thats on the problem
*Thursday, August 15, 2013 at 9:01pm*

**Geometry - incomplete**

For help, finish posting the problem. What are PT and TQ? Read what you have posted. It is woefully incomplete.
*Thursday, August 15, 2013 at 6:09pm*

**Geometry**

Help. PT=5x+3 and TQ=7x-9 Find the value of PT
*Thursday, August 15, 2013 at 4:34pm*

**ADVANCED AMC8 GEOMETRY QUESTION/MATH**

Let S2 be the subset containing all the multiples of 2. There are 50 of them, and they all have 2 as a divisor. So, S2 is one of our subsets. There are fewer than 50 multiples of any other number in a subset of {1 ... 100}. Looks like S2 is our only candidate.
*Thursday, August 15, 2013 at 2:34pm*

**ADVANCED AMC8 GEOMETRY QUESTION/MATH**

Let S be a subset of {1, 2, 3,... 100}, containing 50 elements. How many such sets have the property that every two numbers in S have a common divisor that is greater than 1? I really need help. Give me a good explanation with he answer. Thanks!!! :)
*Thursday, August 15, 2013 at 12:24pm*

**ADVANCED AMC8 GEOMETRY QUESTION/MATH**

In a chess variant, a "lord" can move one space at a time, either upward, or to the right, or diagonally upward and to the right. How many ways are there for a lord to move from the bottom left to top right corner of the 8 by 8 chessboard? This seems like a really ...
*Thursday, August 15, 2013 at 12:18pm*

**Geometry**

The sides have lengths RS: √((3+1)^2+(3-3)^2) = 4 ST: √((5-3)^2+(-1-3)^2) = √20 TU: √((2-5)^2+(-1+1)^2) = 3 UR: √((-2+1)^2+(-1-3)^2) = √17 so, add them up
*Wednesday, August 14, 2013 at 8:43pm*

**Geometry**

Graph it out and use the Pythagorean theorem to find 2 sides. Multiply those together.
*Wednesday, August 14, 2013 at 8:41pm*

**Geometry**

The coordinates of the vertices of a quadrilateral are R(-1,3) S(3,3) T(5,-1), and U(-2,-1).Find the perimeter of the quadrilateral. Round to the nearest tenth.
*Wednesday, August 14, 2013 at 8:38pm*

**geometry**

m<AOC=7x-2, m<DOC=2x+8, m<EOD=27 find the value of X
*Wednesday, August 14, 2013 at 7:46pm*

**Geometry MATH CHECK**

pretty good, but subtraction produces the difference between two values. The length of the line is the distance from one end to the other, or the difference between their values. we take |a-b| because the length of a line segment is always a positive value. The direction does ...
*Wednesday, August 14, 2013 at 3:51pm*

**Geometry**

well, let's see: 8y+4y+8 = 15y-9 3y = 17 y = 17/3 right off, you should have realized that a negative value for y makes no sense, since we are dealing with line segments, which have positive lengths. I'm still bothered by the fraction answer. A simple exercise like ...
*Wednesday, August 14, 2013 at 3:45pm*

**Geometry MATH CHECK**

Check? In your own words, explain why we use the formula AB = |a - b| to find the distance of a segment. Include why you need to subtract and why you need to take the absolute value. We use that formula |a-b| because a and b are representing coodinate numbers you need to ...
*Wednesday, August 14, 2013 at 1:51pm*

**Geometry**

I got y=-17 Am I right?
*Wednesday, August 14, 2013 at 1:35pm*

**Geometry**

I'm sorry rt=15 not 115
*Wednesday, August 14, 2013 at 1:31pm*

**Geometry**

How'd you get that? I was trying the problem and couldn't get it
*Wednesday, August 14, 2013 at 1:30pm*

**Geometry**

RS+ST=RT 8y+4y+8 = 115y-9 103y = -17 y = -17/103 now plug that into the expressions for the segments
*Wednesday, August 14, 2013 at 1:26pm*

**Geometry**

How would you do this? Rs=8y St=4y+8 RT=115y-9 a.Find the value of y b. Find rs, st, rt
*Wednesday, August 14, 2013 at 1:20pm*

**Geometry**

Help? 1. In your own words, explain why we use the formula AB = |a - b| to find the distance of a segment. Include why you need to subtract and why you need to take the absolute value. 2. Compare and Contrast Describe the difference between saying that two segments are ...
*Wednesday, August 14, 2013 at 1:08pm*

**help hexagon geometry**

iiitss hahaha nto telling you
*Wednesday, August 14, 2013 at 1:28am*

**help hexagon geometry**

That's not the answer hes dumb
*Wednesday, August 14, 2013 at 1:27am*

**Math- Urgent**

http://www.mathplanet.com/education/pre-algebra/introducing-geometry/angles-and-parallel-lines
*Tuesday, August 13, 2013 at 7:16pm*

**geometry**

The cubes are each 5 x 5 x 5 cm. Joined together, they form a rectangular prism of dimensions 5 x 5 x 10 cm. Calculate the area of that prism. (Two sides of the original two cubes will be hidden). YEaH ITS TRUE . and to continue with it it will results to 250 sQuare cm :D
*Tuesday, August 13, 2013 at 3:26am*

**Geometry**

Brilliant qn! hint for you : use recursion
*Sunday, August 11, 2013 at 5:42am*

**ADVANCED AMC8 GEOMETRY QUESTION/MATH**

Note that an equilateral triangle is a triangle where all lengths of the sides are equal. If you revolve the triangle about its altitude (or the height), you'll generate a cone (just try to imagine or draw the figure). Therefore, the height of the cone is equal to the ...
*Saturday, August 10, 2013 at 2:02am*

**ADVANCED AMC8 GEOMETRY QUESTION/MATH**

An equilateral triangle of side 14 centimeters is revolved about an altitude to form a cone. What is the number of cubic centimeters in the volume of the cone? Express your answer to the nearest whole number, without units. I just want the answer. Thanks! :)
*Friday, August 9, 2013 at 11:59am*

**Geometry**

Steve this makes sense to me. Thank you I knowvitbis a lot to ask, but how do you get from (r-2)^2 + (8-r)^2 = (+2)^2 to r=4(3-rt5)
*Friday, August 9, 2013 at 9:01am*

**geometry**

N=24*23*22
*Friday, August 9, 2013 at 4:47am*

**geometry**

Martin's iPod has 24 songs on it. He wants to make a playlist consisting of three songs to dance to. Let N be the number of different playlists Martin can make. What are the last 3 digits of N?
*Friday, August 9, 2013 at 4:21am*

**Geometry**

what does side-by-side mean? touching? both marbles touching a vertical line between them? Do both marbles touch the (presumably vertical) sides of the container? clearing up these questions will be a good place to start. In the most reasonable scenario, marbles touching each ...
*Friday, August 9, 2013 at 12:20am*

**Geometry**

guessing what your diagram would look like, sin 75 = x/150 x = 150sin75 = appr 144.9 ft
*Thursday, August 8, 2013 at 10:55pm*

**Geometry **

If the distance from the top of a building to the tip of its shadow is 150 feet and the sun makes a 75 degree angle with the wall as shown in the image below, what is the length of the shadow?
*Thursday, August 8, 2013 at 10:08pm*

**geometry**

iu
*Thursday, August 8, 2013 at 8:49pm*

**Geometry**

Two marbles are sitting side by side in a glass container.b the base of the container is 10 units long and the radius of the smaller marble is 2 units. What is the radius of the larger marble? Describe the strategy used to answer the question.
*Thursday, August 8, 2013 at 6:22pm*

**ADVANCED AMC8 GEOMETRY QUESTION/MATH**

the triangle has height 7√3/2 the cone base has a radius of 7 v = 1/3 pi r^2 h plug and chug
*Thursday, August 8, 2013 at 12:59pm*

**ADVANCED AMC8 GEOMETRY QUESTION/MATH**

An equilateral triangle of side 14 centimeters is revolved about an altitude to form a cone. What is the number of cubic centimeters in the volume of the cone? Express your answer to the nearest whole number, without units. I really need help on this. I want the answer. Thanks!
*Thursday, August 8, 2013 at 12:57pm*

**geometry**

I think we need to see the figure (because no dimensions are given)...
*Wednesday, August 7, 2013 at 11:19pm*

**geometry**

a. RS + ST = RT 8y+4 + 4y+8 = 15y-9. Solve for y. b. Replace y with the value calculated in prob. a.
*Wednesday, August 7, 2013 at 6:41pm*

**geometry**

RS=8y+4 ST=4y+8 RT=15y-9 a.) what is the value of y? b.)find RS, ST, AND RT
*Wednesday, August 7, 2013 at 5:31pm*

**Chemistry**

What is the Lewis structure formula, electron pair geometry and the molecular geometry for SO4^2-
*Wednesday, August 7, 2013 at 1:12am*

**Chemistry**

What is the electron pair geometry for NCL3?
*Wednesday, August 7, 2013 at 1:09am*

**Chemistry**

What is the electron pair geometry for NCL3?
*Wednesday, August 7, 2013 at 1:04am*

**GEOMETRY MATH QUESTION**

the cubes are of side 1,2,3,5 Their areas are 6,24,54,150 If we glue the 3-cube to the 5-cube, it will cover 9 cm^2 of both cubes, leaving 150+54-18=186cm^2 exposed If we then glue the 2-cube to the 5-cube next to the 3-cube, it will cover 4cm^2 on the 5-cube and 3-cube, and ...
*Tuesday, August 6, 2013 at 3:38pm*

**GEOMETRY MATH QUESTION**

Four cubes of volumes 1cm^3, 8cm^3, 27cm^3, and 125cm^3 are glued together at their faces. What is the number of square centimeters in the smallest possible surface area of the resulting solid figure? I want a clear explanation with the answer. :):) thanks!
*Tuesday, August 6, 2013 at 3:32pm*

**Math (Geometry)**

3 times the side, 9 times the area
*Tuesday, August 6, 2013 at 2:48pm*

**Math (Geometry)**

1. A rhombus has an area of 5 square meters and a length of 3 meters. In a similar rhombus, the length of a side is 9 meters. What is the area of the second rhombus? [Area= diagonal1 X diagonal2 / 2]
*Tuesday, August 6, 2013 at 11:54am*

**geometry**

Jackson is creating a water garden surrounded by a triangular patch of grass. If the pond will take up the space indicated by the circle, how many square feet of sod will he need to complete the garden (use 3.14 for and round your answer up to the next foot)? A. 8 square feet ...
*Tuesday, August 6, 2013 at 10:59am*

**geometry**

150
*Monday, August 5, 2013 at 12:37pm*

**Math Geometry**

Each small circle has area pi The intersections each have area pi/2 - 1, so the 4 areas of intersection have area 2pi-4 The large circle has area 4pi. The points outside all the small circles lie only in the big circle. the points in each of the intersections lie in 2 small ...
*Saturday, August 3, 2013 at 5:54pm*

**Math Geometry**

Four circles of unit radius are drawn with centers (1,0), (-1,0), (0,1), and (0,-1). A circle with radius 2 is drawn with the origin as its center. What is the area of all points which are contained in an odd number of these 5 circles? (Express your answer in the form "a ...
*Saturday, August 3, 2013 at 5:41pm*

**arithmetic errror - go with Steve Math, Geometry**

made a silly error ... (√3/2)x^2 = 2/√3 3x^2 = 4 x^2 = 8/3 x = √8/√3 I also read your area of the triangle as 2/√3 whereas Steve took it as 2√3
*Saturday, August 3, 2013 at 12:01am*

**Math, Geometry**

Let the side of the equilateral triangle be x area of equilateral triangle = (1/2)x^2 sin60° = (1/2)x^2 (√3/2) = (√3/4)x^2 (√3/2)x^2 = 2/√3 3x^2 = 4 x = 2/√3 perimeter of triangle = 3x = 6/√3 which is equal to the perimeter of the square...
*Friday, August 2, 2013 at 11:53pm*

**Math, Geometry**

the triangle of side s has altitude s√3/2 So, it has area 1/2 (s)(s√3/2) = s^2√3/4 So, if s^2√3/4 = 2√3, s = √8 So, the triangle has perimeter 3√8 If the square has perimeter 3√8, it has side 3√8/4 = 3/2 √2 The ...
*Friday, August 2, 2013 at 11:49pm*

**Math, Geometry**

A square and an equilateral triangle have equal perimeters. The area of the triangle is 2\sqrt {3} square inches. What is the number of inches in the length of the diagonal of the square? Please give me a full clear explanation with the answer. Thanks!!!!!!!
*Friday, August 2, 2013 at 9:22pm*

**geometry**

since R+S+T=180° 5x-3 + 3x+2 + x+10 = 180 9x +9 = 180 9x = 171 x = 19 m<R = 5x-3 = 92°
*Friday, August 2, 2013 at 5:20pm*

**Geometry**

a ladder which is place against a building whose height is 40 metres should have a base of?
*Friday, August 2, 2013 at 12:46pm*

**math**

http://www.mathsisfun.com/geometry/perimeter.html
*Wednesday, July 31, 2013 at 7:35pm*

**Geometry**

Y is 2/5 of the way from X to Z x changes by -10 y changes by -5 when moving from X to Z. So, Y = X+(-4,-2) = (3,0)
*Wednesday, July 31, 2013 at 5:17am*

**Geometry**

Point Y lies on line segment XZ, between X and Z. The (x,y) coordinates for X and Z are (7,2) and (-3,-3), respectively. If the ratio of line segment XY to line segment YZ is 2 to 3, what are the (x,y) coordinates of Y?
*Wednesday, July 31, 2013 at 1:06am*

**Math**

http://www.math.com/tables/geometry/surfareas.htm
*Tuesday, July 30, 2013 at 4:02pm*

**Geometry**

Are these your choices? A ruler should be used to measure the length of the rays forming the angle. A protractor should be used to measure the angle that has been constructed. A straightedge should be used to draw rays to create a copy of an angle. A string should be used to ...
*Monday, July 29, 2013 at 8:07pm*

**Geometry**

he chart below shows the names of all the tools that Valerie used to construct an acute angle. Tools used 1) Paper 2) Pencil 3) Compass Which statement best explains why Valerie’s construction may be inaccurate?
*Monday, July 29, 2013 at 8:04pm*

**Geometry**

77y
*Monday, July 29, 2013 at 10:32am*

**geometry**

divide each polygon into identical isosceles triangles. Find the area of one triangle and multiply by the number of sides.
*Sunday, July 28, 2013 at 5:53am*

**geometry**

For an inscribed n-gon, circle radius is r A = (r^2 *n sin(2pi/n))/2 For the circumscribed n-gon A = r^2 *n tan(pi/n)
*Saturday, July 27, 2013 at 11:25pm*

**geometry**

consider a circle of radius 1, and corresponding inscribed and circumscribed polygons with the number of sides n = 3, 4, 5, 6, and 8. A: For each n = 3, 4, 5, 6 & 8, what are the areas of the inscribed and circumscribed polygons with n sides?
*Saturday, July 27, 2013 at 10:32pm*

**geometry**

consider a circle of radius 1, and corresponding inscribed and circumscribed polygons with the number of sides n = 3, 4, 5, 6, and 8. A: For each n = 3, 4, 5, 6 & 8, what are the areas of the inscribed and circumscribed polygons with n sides?
*Saturday, July 27, 2013 at 8:24pm*

**Geometry**

We have P1(6,-2), P2(1,3) Use Slope=(y2-y1)/(x2-x1) to find slope.
*Saturday, July 27, 2013 at 4:31pm*

**Geometry**

find the slope of the lines passing through the points. (6,-2), (1,3).
*Saturday, July 27, 2013 at 3:56pm*

**GEOMETRY QUESTION**

I still don't get it. So what's the answer. Your solution is very confusing.
*Saturday, July 27, 2013 at 3:18pm*

**Geometry**

1. slope AB = (k-3)/(8-7) = 5 k-3 = 5 k = 8 2. let it be Ø you know that Ø + 68 + 54 = 180 Ø = ....
*Saturday, July 27, 2013 at 2:23pm*

**Geometry**

1. AB has endpoints A(8,K) and B(7,3). The slope of AB is 5. What is K? 2. Two angles of a triangle measure 68 and 54. What is the measure of the third angle?
*Saturday, July 27, 2013 at 12:58pm*

**geometry**

What is the meaning of P(6,6)? Is it the value of P(x,y) where x = y = 6? Is that 2/(3x) or (2/3)*x on the right?
*Saturday, July 27, 2013 at 7:20am*

**geometry**

P(6,6)y=2/3x
*Saturday, July 27, 2013 at 2:23am*

**Geometry**

since A+B+C = 180, B+C = 180-A the rest should be easy. If not, show us where you get stuck.
*Saturday, July 27, 2013 at 12:02am*

**Geometry**

ABC is an obtuse triangle with m<A=21 and <C is acute. a)What is m<B+m<c? B)What is the range of whole numbers for m<C? C)What is the range of whole numbers for m<B?
*Friday, July 26, 2013 at 11:30pm*

**geometry**

<1 = <2 = 4x-9 = 63o. 4x-9 = 63 4x = 63+9 = 72 X = 18o. The value of 9 is 9.
*Friday, July 26, 2013 at 7:01pm*

**Geometry - eh?**

No way the problem could have been presented as written. It makes no sense.
*Friday, July 26, 2013 at 3:42pm*

**Geometry**

Vertically opposite angles are equal. What is x when 4x=56?
*Friday, July 26, 2013 at 1:04pm*

**Geometry**

<1 and <2 are vertical angles. If m<1=4x and m<2=56. What is the value of x?
*Friday, July 26, 2013 at 12:32pm*

**Geometry**

a rectangular swimming pool has an area of double 1500ft. The rectangular pool is 50ft. The rectangular walkway that surrounds the pool is 4ft. How many feet of fencing do you need to surround the walkway?
*Friday, July 26, 2013 at 12:04pm*

**geometry**

<1 and <2 are vertical angles. If m<1=63 and m<2=4x-9 what is the value of 9.
*Friday, July 26, 2013 at 11:15am*

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