# Questions on Geometry: Geometric formulas answered by real tutors!

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 Geometric and Other Formulas Answers archive In Depth

 Question 20390: How do I find the centre of a circle ? I done this in high school, but that was 25 years ago, and now I just can't remember it. Click here to see answer by AnlytcPhil(1278)

 Question 21574: I need to come up with an equation (I am in algebra) and then compute the following: The length of a rectangular table top is 8 feet shorter than 5 times the width. If the area of the table top is 48 square feet, find the dimensions of the table? I am so confused. Can someone help!! Click here to see answer by Paul(988)
 Question 21574: I need to come up with an equation (I am in algebra) and then compute the following: The length of a rectangular table top is 8 feet shorter than 5 times the width. If the area of the table top is 48 square feet, find the dimensions of the table? I am so confused. Can someone help!! Click here to see answer by Earlsdon(6294)

 Question 22790: The height of a triangle is one-half the length of the base. The area of the triangle 144in exponent 2. Find the height of the triangle. Click here to see answer by stanbon(57984)

 Question 22610: find the area of a 3 foot wide pathway aroun a circular flower bed that is 12 feet in diameter Click here to see answer by rapaljer(4667)

 Question 23282: the transformation with rule T(x,y)=(x+2,y+6)is translation a.graph (7,3)and T(7,3) B.FIND THE SLOPE OF THE LINE THROUGH (7,3)and its image Click here to see answer by venugopalramana(3286)

 Question 23481: Solve. A= 1/2h(b1+b2) for h NOTE!: (the numbers after the two b's in the forumla are exponents) thank you! Click here to see answer by rapaljer(4667)

 Question 23507: Hi I would like to know the formula for working out x squared = x + 6. If you can answer my question, I am very thankful. Click here to see answer by rapaljer(4667)

 Question 23639: Determine two vectors that are perpendicular to each other and also perpendicular to u = [4, -3, 1]. Click here to see answer by venugopalramana(3286)

 Question 20490: L has y intercept(0,-3) and is parallel to the line with equation 2/3x + 1 Click here to see answer by smartypants(7)

 Question 25729: I have a word problem I need help with. A dog is tied to a 8ft. rope tied to a stake in the middle of the circle. The radius of the circle is 8ft. About how much room does the dog have room to play in. Click here to see answer by elima(1433)

 Question 25880: I am having trouble with this question…Use the arithmetic series of numbering of 1,3,5,7,9,….to find the following: What is the difference between any 2 terms? Is this the formula for this question….Sum= n(a1+an)/2) if this right I’m not sure where to go next. Please help….. Click here to see answer by venugopalramana(3286)

 Question 26075: 10) Use the geometric series of numbers 1, 1/2, 1/4, 1/8,…to find the following: a) What is r, the ratio between 2 consecutive terms? b) Using the formula for the nth term of a geometric series, what is 10th term? c) Using the formula for the nth term of a geometric series, what is 12th term? d) What observation can make about these sums? In particular, what number does it appear that the sum will always be smaller than? Click here to see answer by venugopalramana(3286)

 Question 26074: 1) Use the geometric series of numbers 1, 2, 4, 8,…to find the following: a) What is r, the ratio between 2 consecutive terms? b) Using the formula for the nth term of a geometric series, what is the 24th term? c) Using the formula for the sum of a geometric series, what is the sum of the first 10 terms? pls help Click here to see answer by venugopalramana(3286)

 Question 26096: Hi, I need help on this question:\ Using the formula for the nth term of an arithemic series,what is the 101st term? Click here to see answer by stanbon(57984)

 Question 15982: how do you solve for d in the problem pi=c/d Click here to see answer by mathrebel(25)

 Question 26224: 4) CLASSIC PROBLEM - A traveling salesman (selling shoes) stops at a farm in the Midwest. Before he could knock on the door, he noticed an old truck on fire. He rushed over and pulled a young lady out of the flaming truck. Farmer Brown came out and gratefully thanked the traveling salesman for saving his daughter’s life. Mr. Brown insisted on giving the man an award for his heroism. So, the salesman said, “If you insist, I do not want much. Get your checkerboard and place one penny on the first square. Then place two pennies on the next square. Then place four pennies on the third square. Continue this until all 64 squares are covered with pennies.” As he’d been saving pennies for over 25 years, Mr. Brown did not consider this much of an award, but soon realized he made a miscalculation on the amount of money involved. a) How much money would Mr. Brown have to put on the 32nd square? b) How much would the traveling salesman receive if the checkerboard only had 32 squares? Calculate the amount of money necessary to fill the whole checkerboard (64 squares). How much money would the farmer need to give the salesman? Thank you so, much for your help. Click here to see answer by venugopalramana(3286)

 Question 26332: how many conversation will there be at a party of 50 people. (each person only talk to each other once.) Click here to see answer by venugopalramana(3286)

 Question 26229: An open-top box is to be constructed from a 6 by 8 foot rectangular cardboard by cutting out equal squares at each corner and the folding up the flaps. Let x denote the length of each side of the square to be cut out. a) Find the function V that represents the volume of the box in terms of x. b) Graph this function. c) Using the graph, what is the value of x that will produce the maximum volume? Click here to see answer by venugopalramana(3286)

 Question 26465: A rectangular garden is to be surrounded by a walkway of constant width. The gardens dimensions are 30 ft by 40 ft. The total area, garden plus walkway, is to be 1800 ft2. What must be the width of the walkway to the nearest thousandth? I am unable to figure this problem out at all. If you could please help me I would greatly appreciate it!! Thank you!! Click here to see answer by Earlsdon(6294)

 Question 26498: I need help with this question, I have a few of the answers but need the rest. Thanks Jeff 1) Use the arithmetic series of numbers 1, 3, 5, 7, 9,…to find the following: a) What is d, the difference between any 2 terms? Answer: 2 Show work in this space. 1+2=3+2=5+2=7+2=9 b) Using the formula for the nth term of an arithmetic series, what is 101st term? Answer: Show work in this space. c) Using the formula for the sum of an arithmetic series, what is the sum of the first 20 terms? 400 d) Answer:Show work in this space e) Using the formula for the sum of an arithmetic series, what is the sum of the first 30 terms? Answer: Show work in this space Click here to see answer by stanbon(57984)

 Question 18681: hi if i have all three angles in a triangle, how can i find the relationship of all three sides in length, for instance if one side is known to be so many feet, what are the other two individually is this one of the trigonometric functions? thank you Click here to see answer by stanbon(57984)

 Question 27237: The equation of the line parallel to 3x-y=6 and passing through the point (3,2) is: a) y=-1/3x+1 b) y=1/3x+3 c)y=3x+7 d)y=3x+11 e) y=3x-7 I need the step by step to solve this! Click here to see answer by rodriguezh2(15)

 Question 27542: What is the formula for finding the perimeter of a circle? And the perimeter of a semi-circle? Click here to see answer by sdmmadam@yahoo.com(530)

 Question 27800: A cirlce has its center at the center of the square with 9-inch sides. Find the area of the square not covered by the circle to the nearest 10th. Is it a) 2.3 in b) 8.0 in c) 17.4 in d) 64.3 in I'm not even sure how to figure this out. Click here to see answer by Earlsdon(6294)

 Question 28532: The volume of a cube is given by V = s3. Find the length of a side of a cube if the Volume is 1000 cm3. Click here to see answer by sdmmadam@yahoo.com(530)

 Question 28786: The British Airways London Eye is a giant Ferris wheel with a circumference of 424 meters. If it takes 30 minutes to make one revolution, what is its rate in meters per second? Give your answer to the nearest hundreth. Click here to see answer by stanbon(57984)

 Question 29160: 2) The volume of a cylinder (think about the volume of a can) is given by V = πr2h where r is the radius of the cylinder and h is the height of the cylinder. Suppose the volume of the can is 121 cubic centimeters. a) Write h as a function of r. b) What is the measurement of the height if the radius of the cylinder is 3 centimeters? c) Graph this function. Click here to see answer by Earlsdon(6294)

 Question 29234: A right triangle is a triangle with one angle measuring 90°. In a right triangle, the sides are related by Pythagorean Theorem, , where c is the hypotenuse (the side opposite the 90° angle). Find the hypotenuse when the other 2 sides’ measurements are 6 feet and 8 feet. Click here to see answer by Nate(3500)

 Question 29233: Suppose you travel north for 65 kilometers then travel east 75 kilometers. How far are you from your starting point? Click here to see answer by Nate(3500)

 Question 29232: The volume of a cube is given by V = s3. Find the length of a side of a cube if the Volume is 1000 cm3. Click here to see answer by Nate(3500)

 Question 29496: the perimeter of a rectangle is 32m and the area of the rectangle is 55m squared. Find the dimensions of the rectangle Click here to see answer by sdmmadam@yahoo.com(530)

 Question 30293: PLEASE EXPLAIN TO ME HOW TO FIND C^2=1305 THE QUESTION IS IF A=24 AND B=27 THEN WHAT IS C? C^2=(24)^2+(27)^2 c^2=576+729 C^2=1305 SO C=WHAT Click here to see answer by longjonsilver(2297)

 Question 30542: What is the inside radius of a sphere (r) in centimeters and What is the outside radius of a sphere (R) in centimeters if: V=4/3*pi*R^3 - 4/3 *pi* r^3 Thank You Click here to see answer by Fermat(127)

 Question 30994: What is Precision? and What is the Precision for 80 inches? Thank You for your help Click here to see answer by ichudov(499)

 Question 31283: I have a jar that has a circumference of 28.5 and a height of 12.5. It is hermetically sealed and inside there are normal sized jelly beans, filling the jar completely. How can I figure out how many jelly beans are inside with out counting all of them? Click here to see answer by josmiceli(9819)

 Question 31398: How do I compute the length of a chord line and the height at the mid point of the chord, only having the radius and the length of arc. Thanks, Ed Click here to see answer by stanbon(57984)

 Question 33322: For all real numbers a and b, where b does not equal 0, a*b= a squared over b squared , find (3*4)(5*3) Click here to see answer by stanbon(57984)

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