| Subject | Date Asked | Expert |
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| Analytic Geometry - Perpendicular Line | 7/1/2009 | Azeem Hussain |
Q: What is the equation for a line that passes thru (2,5) and is perpendicular to line y=0.5x-3? The ...
A: Hey Marie! Begin by finding the slope of the line. Perpendicular lines have slopes that are ...
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| Perpendicular Lines | 6/30/2009 | Azeem Hussain |
Q: if the perpendicular lines doesn't form a right angle, can it still be considered perpendicular? ...
A: Perpendicular lines are at right angles, 90 degrees, ALWAYS. This is their definition. Two ...
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| Perpendicular Bisector | 6/29/2009 | Azeem Hussain |
Q: It has been a LONG time since I did Geometry. Can you help me understand this? Do I draw this or ...
A: There is a mathematical way of figuring this out. Begin by finding the slope of AB. This is done ...
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| Wrap Around a Bucket | 6/28/2009 | Azeem Hussain |
Q: I'm wrapping a vinyl adhesive around a bucket, and can't get the fit exact. I tried drawing the top ...
A: You'll need to cut a sort of arch thing you have in the picture. It will have to be 31.42" on the ...
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| Basic Trig Involving Systems | 6/22/2009 | Azeem Hussain |
Q: From a point A, the angle of elevation of the top of a transmission tower is 57*. At the point B, ...
A: Begin by sketching the situation. Assume the tower is perpendicular to the ground. You will have a ...
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| Unit Explanations | 6/16/2009 | Azeem Hussain |
Q: Why is perimeter measured in units and area is measured in square units? Please give examples to ...
A: Dwayne, Reread the last part of my answer. It's essentially the same as with area, but in three ...
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| Unit Explanations | 6/16/2009 | Azeem Hussain |
Q: Why is perimeter measured in units and area is measured in square units? Please give examples to ...
A: When you're measuring perimeter you are only dealing with one dimension. If I asked you to find the ...
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| Construction of Equilateral Triangle Around Given Center | 6/16/2009 | Azeem Hussain |
Q: Given only the length of the sides of an equilateral triangle and a point, how do I construct the ...
A: Hey Dauda! Begin by constructing an equilateral (elsewhere on the page) using the given side ...
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| Basic Trig - 2 Wires | 6/15/2009 | Azeem Hussain |
Q: A pole is used to support an observation platform. The top of the pole is secured by two wires, one ...
A: Assuming the pole is perpendicular to the ground, the pole and its two supporting wires comprise two ...
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| Circumference - Challenge Questions | 6/11/2009 | Azeem Hussain |
Q: I really need help with numbers 4-6 on the following page : ...
A: For question 4, you know the total perimeter is equal to twice the side of the square plus twice the ...
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| Surface Area - Painting a Spherical Tank | 6/7/2009 | Azeem Hussain |
Q: I'm having a very hard time finding out how much paint I need to cover a spherical tank with a ...
A: Begin by finding the surface area of the sphere. To do this, you need the radius which is half the ...
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| Loci | 6/4/2009 | Azeem Hussain |
Q: 1. sketch and describe the locus of all points in a plane that are 4 centimeters from a circle with ...
A: 1. The locus would be a circle with radius of 12 (8+4=12). 2. This locus is really just a single ...
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| Skydiving | 5/31/2009 | Azeem Hussain |
Q: "My name is Kira Yuta I am in grade eleven in USA I am studying for my final exam and I came a upon ...
A: "98% of its terminal velocity" means v=(0.98)45=44.1. Plug this into the equation and solve for t. ...
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| Skydiving | 5/30/2009 | Azeem Hussain |
Q: "My name is Kira Yuta I am in grade eleven in USA I am studying for my final exam and I came a upon ...
A: What you need to understand in order to solve the question is written immediately before the ...
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| Surface Area of Triangular Pyramid | 5/20/2009 | Azeem Hussain |
Q: I have a Triangular Pyramid - all edges are 3cm. How do I figure the Surface area and volume?
A: Every triangle is an equilateral, meaning they have angles measuring 60 degrees each. Subdivide an ...
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| Working Backwards on a Number Problem | 5/18/2009 | Azeem Hussain |
Q: I'm stuck on a geometry question and I dont understand it. Here's theA number is added to 4. The ...
A: The easiest way to do this is to start at the last step and do the opposite of what is said. (The ...
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| Area - Sphere | 5/18/2009 | Azeem Hussain |
Q: I recently took a geometry test, and i am required to correct all wrong answers. The only question ...
A: The radius of a sphere can be found from its diameter, exactly as you would do for a circle: divide ...
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| Comparing Prism Areas | 5/16/2009 | Azeem Hussain |
Q: the base of the right triangular prism is an equilateral triangle with a perimeter of 30 in. the ...
A: Hey Matt, Lateral area is the product of the base perimeter and the height. Total surface area is ...
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| Sphere - Surface Area | 5/8/2009 | Azeem Hussain |
Q: i have a globe that has a volume of 33.5103 inches cubed i need to find the surface area of the ...
A: The volume of a sphere (a globe is a sphere) can be found by the equation V=(4(pi)r^3)/3. Plug in V ...
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| Triangles and the Quadratic Formula | 5/7/2009 | Azeem Hussain |
Q: I read your answer to another student about how to solve a question similar to this one: "The ...
A: Start by expanding your squares. 15²=x²+(x+2)² (15)(15)=x²+(x+2)(x+2) 225=x²+x²+2x+2x+4 Collect ...
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| Basic Trig - Tree | 5/5/2009 | Azeem Hussain |
Q: can you please help me drawing and solving this problem. i tried but i don't think it is the right ...
A: This problem requires you to use basic trigonometry twice. Begin by drawing your tree tilted at 12 ...
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| Lateral Area - Regular Prism | 4/14/2009 | Azeem Hussain |
Q: I don't understand how to find the lateral area for regular prism. Can you explain in steps how do i ...
A: A regular prism has 6 faces, all of which are rectangles. I'll ask you to draw a rectangular ...
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| Similarity with Volumes | 4/13/2009 | Azeem Hussain |
Q: ..STILL trying to help my daughter out but I can`t remember radius etc..... ( x 3.14, etc) I really ...
A: a) Cylinders and cones work the same ways as pyramids and prisms. The volume of a cylinder is the ...
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| Volumes and Base Areas | 4/13/2009 | Azeem Hussain |
Q: ...I am the mom of a 9th grader and I am having a difficult time helping her with her homework. I am ...
A: The volume of a pyramid is one-third of the product of the area and the height. V=Ah/3 (4.7)=A(1.5) ...
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| Twisted Tape Measure | 3/31/2009 | Azeem Hussain |
Q: March 31, 2009 Azeem, If you pull a long steel measuring tape out to, say, 10 meters, and make a ...
A: There are undoubtedly the variables of tape width and how tightly it can be twisted. From my own ...
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| Polygons - Names | 3/25/2009 | Azeem Hussain |
Q: what are the names of the polygons eleven through twenty?
A: 11-Hendecagon 12-dodecagon 13-triskaidecagon 14-tetrakaidecagon 15-pentakaidecagon 16-hexakaidecagon ...
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| Optimization - Area | 3/25/2009 | Azeem Hussain |
Q: . OK OK this is the original problem: a 30 cm wire is cut to two. One piece is to bend to a square. ...
A: Let the perimeter of the rectangle equal x and that of the square equal y. x+y=30, so y=30-x. ...
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| Algebraic Volume and Surface Area | 3/24/2009 | Azeem Hussain |
Q: . I need help to figure out the followings: I want to find the ratio of the volume to the surface ...
A: Begin by calculating the volume (multiply all 3 dimensions). Then calculate your surface area ...
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| Analytic Geometry - Line Division | 3/17/2009 | Azeem Hussain |
Q: If W2 is the starting point, then W7 is located two-thirds of the way between W2(0,3) and ...
A: Sketch the situation. Divide the line segment approximately. You have 2 segments. Indicate their ...
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| Trig Identities | 3/15/2009 | Azeem Hussain |
Q: I am to verify 1-(sinx- cosx)^2/ sin x= 2cos x I got as far as cos^2x+ cos^2x/ sinx; which may or ...
A: You need to verify this identity: [1-(sin x-cos x)^2]/sin x=2cos x. Note the brackets. Be sure to ...
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| Trigonometry - Radians | 3/15/2009 | Azeem Hussain |
Q: the question is: Find all the angles (A) (between 0 and 2pi) that sastisfy the equation sineA = -1 ...
A: The easiest way to visualize this is to draw a circle centred at the origin with a radius of 1. sin ...
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| Most Common Digit from 1 to 1000 | 3/12/2009 | Azeem Hussain |
Q: Numbers are 1 to 1000. What is the most common number used in the series and what is the least used? ...
A: I would say the least used digit is 0. This is because there is only one double zero per hundred. ...
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| Basic Trig - Angle of Elevation Word Problem | 3/10/2009 | Azeem Hussain |
Q: You are skiing down a mountain with a vertical height of 1500 feet. The distance from the top of the ...
A: Think of the mountain as a right triangle seen from the side. The height is equal to 1500 and the ...
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| Trig - Carpenterial Angles | 3/9/2009 | Azeem Hussain |
Q: March 3, 2009 How is the math done in the general example of the following specific situation? You ...
A: This formula is correct, but can be simplified as: angle_of_error=ASIN(RADIANS(distance_high/c)) ...
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| Calculus I - Minimizing Cost | 3/9/2009 | Azeem Hussain |
Q: the area of the yard is 100 sq m. To put a fence around the yard the cheapest way at a cost of ...
A: Let x equal length and y equal width. xy=100. (Your assumption about the perimeter is not ...
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| Surface Area and Volume Formulae | 3/8/2009 | Azeem Hussain |
Q: what is the formula for surface area and volume for square pyramid, cyclinder, hemisphere, and ...
A: Square pyramid: (b=base length, h=height, a=apothem) SA=b^2+2ab V=hb^2/3 Cylinder: ...
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| Trig - Carpenterial Angles | 3/7/2009 | Azeem Hussain |
Q: March 3, 2009 How is the math done in the general example of the following specific situation? You ...
A: If your question is an actual follow-up to your original question, ask it as a follow-up. If it is ...
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| Trig - Carpenterial Angles | 3/3/2009 | Azeem Hussain |
Q: March 3, 2009 How is the math done in the general example of the following specific situation? You ...
A: You can breathe a sigh of relief; trigonometry can allow you to solve for everything you've ...
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| Ovoids | 3/2/2009 | Azeem Hussain |
Q: I am trying to be sure that I am using the proper terminology. An egg shape (like a chicken egg) ...
A: Ovals are loosely defined in mathematics. I'd like to first say that the term ovoid is derived from ...
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| Non-collinear Points | 3/1/2009 | Azeem Hussain |
Q: I am having trouble with thisPlot 7 non-collinear points on a page. How many different triangles can ...
A: Hey Mia! Ignore the "at a time" part. To make a triangle you need to join three points, and that's ...
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