Questions on Geometry: Area and Surface Area answered by real tutors!

Tutors Answer Your Questions about Surface-area (FREE)

Question 467135: You have a sector PQR where QR is the arc of the circle with center P. If the lenght of the arc QR is 6pi, and the angle formed at point P is 30 degrees, what is the area of the sector PQR?
The answer is 108pi.
I do not understand how they got this answer.
Can you help?
Click here to see answer by jim_thompson5910(35256)

Question 468321: 1. what is the height of a 35 inch tv?
Click here to see answer by Alan3354(69443)

Question 469004: Hello I have a word problem that i can't seem to figure out. I need a little help.
Taxpayers with an office in thir home may deduct a percentage of their home related expenses. This percentage is based on the ratio of the office's area to the area of the home. A taxpayer with an office in a 2200 square foot home maintains a 20 foot by 16 foot office. If the yearly electric bills for the home come to $4800, how much of this is deductible?
Thank you
Click here to see answer by jorel1380(3719)

Question 469185: How do I find the square root of a hexagon with a 4-inch side? So confusing!
Click here to see answer by Alan3354(69443)

Question 469201: If the area of a circle is 720 cm2, what is the area of the sector if the central angle measures 12degrees?

A storage tank in the shape of a cube is to be insulated using material that costs $2.50 per square foot. If the edge of the cube is 12 feet, how much will the insulation cost?
Click here to see answer by Alan3354(69443)

Question 470894: the dimension of a rectangular prism are n,n+7 and n+8.use the formula v=lwh to write a polynomial in standard form for the volume of the prism
Click here to see answer by ewatrrr(24785)

Question 470889: find the trinomial that represents the area of the square if the measure of the side is (7b-3)

Click here to see answer by ewatrrr(24785)

Question 470896: the area of a rectangular desk is given by the trinomial x2-7x-18.what are the possible dimensions of the desk?use factoring

Click here to see answer by ewatrrr(24785)

Question 471600: a regular hexagonal prism has a volume of 360 ft^2, what are the dimensions that create the minimum surface area?

Click here to see answer by robertb(5830)

Question 472968: How do you find the slant height and base edge of a regular square pyramid when the height is 6 and the lateral edge is 10?
Click here to see answer by Theo(13342)

Question 473633: Pyramids-use a sketch to explain the following terms: apex, slant faces, slant edge, slant height, perpendicular height.
Click here to see answer by richard1234(7193)

Question 473724: Please help me! This is really hard and I don't know how to do it. Help would be MUCH appreciated!
"A design on the surface of a balloon is 9 cm wide when the balloon holds 62 cm3 of air. How much air does the balloon hold when the design is 18 cm wide?"
A.124 cm3
B.407 cm3
C.248 cm3
D.496 cm3"
THANK YOU!!!

Click here to see answer by jorel1380(3719)

Question 473725: Please help me! This is really hard and I don't know how to do it. Help would be MUCH appreciated!
"Find the surface area of a sphere that has a diameter of 4 cm."/
A.64π cm2
B. 32/3 pi cm^3.
C. 4 pi cm^2
D. 16 pi cm^2"

THANK YOU!!!

Click here to see answer by ccs2011(207)

Question 473912: whats the area of a regular hexagon with hte apothem 8.7ft long and a side 10ft long?
Click here to see answer by Alan3354(69443)

Question 474890: how to find the base of isosceles prism with sides 15cm 15cm and 18cm and prism height 25cm
Click here to see answer by Theo(13342)

Question 475032: John had a square patio. After expanding the length by 20 ft. and the width by 10 ft. the area was 999 ft^2 What was the perimeter of the original patio?
Click here to see answer by ankor@dixie-net.com(22740)

Question 475190: The surface area is 42 and seven-eights what is the volume.
Click here to see answer by Alan3354(69443)

Question 475336: What is the surface area of a rectangular prism with length 20 m, width 7 m, and height 3 m?
Click here to see answer by Theo(13342)

Question 475514: Help please!!!
Find a simplified expression for the area of a rectangle with length= 2x+3 and width= x-2
Click here to see answer by jorel1380(3719)

Question 475691: A cardboard can with metal ends is to be constructed. The diameter of the metal ends is to be 8 inches and the height of the can is to be 5 inches. Answer the following questions by clearly showing your work. A.) How much metal, and how much cardborad is needed to construct such a can? B.) What is the capacity of the can?
Click here to see answer by lwsshak3(11628)

Question 475690: A factory makes metal signs. Its machines have been set at an angle that allows them to cut out pentagonal direction signs. How much should this angle be increased or decreased to change the machines so they will cut out metal shapes used to make standard octagonal (8 sides) stop signs? Assume all signs to be regular polygons.
Click here to see answer by htmentor(1343)

Question 475724: find the surface area of a right rectangular prism if the base is 12 feet by 8 feet and the height = 5 feet
Click here to see answer by ewatrrr(24785)

Question 475695: Some students found a pirate treasure map with the following clues: "Take ye 20 paces East of the old oak tree; then 15 North and 18 West. Walk 9 paces North and another 5 East and here ye find me tresure." How many paces, in a straight line, was the treasure from the oak tree?
Click here to see answer by ankor@dixie-net.com(22740)

Question 475606: Find the area of a cloth required to cover a circular table top if the diameter of the table is 3m and the cloth must overhang the edge of the table by 01.m.
Click here to see answer by ankor@dixie-net.com(22740)

Question 476122: What is the arc length of an arc with central angle 262 degrees and radius 9cm? Express your answer in pi and round the final answer to the nearest hundredth.
Click here to see answer by stanbon(75887)

Question 476255: A tennis bakl has a diameter of 7 cm. What are the surface area and volume of the ball?
Click here to see answer by Alan3354(69443)

Question 476497: A traffic cone is 19 inches tall & has a radius of 5 inches. Find the surface area.
Click here to see answer by ccs2011(207)

Question 476517: A traffic cone is 19 inches tall & has a radius of 5 inches. Find the LATERAL area.
Click here to see answer by Engg.N Magampon(6)

Question 476621: find the area of a circle that has a diameter of mi. use 22/7 for a pi.
Click here to see answer by Alan3354(69443)

Question 476533: use Dera to find a angle, varible and side
find m<2
D=given
E=
R=
A=

Click here to see answer by richard1234(7193)

Question 477502: The area of a square is 144 square feet. What is the length of one side of the garden?
Click here to see answer by ewatrrr(24785)

Question 477526: The area of a trapezoid is 110. If one base measures 9 and the height of the trapezoid is 10, find the length of the missing base.
Click here to see answer by stanbon(75887)

Question 477800: if the altitude of a right cylinder is doubled, what happens to its surface area?
Click here to see answer by Alan3354(69443)

Question 478014: I'm having Geometry homework trouble. Please help, if you can!
My homework question says: Determine (a) the area and (b) the circumference of the circle. Use the π key on your calculator and round your answer to the nearest hundredth (My calc doesn't even have that symbol).
Here is the photo:
http://www.flickr.com/photos/62474130@N03/6010245380/
Also, does the π symbol me "pi constant"? Thank you for your help.

Click here to see answer by MathLover1(20849)

Question 478458: The Problem says this:
Find the area of the triangle shown below. Include correct units with your solution.
I am having a little bit of trouble, so if you can be of some assistance, I will be grateful. Thank you!
See triangle here:
http://www.flickr.com/photos/62474130@N03/6013438761/
Click here to see answer by mananth(16946)

Question 478733: . How many cubic inches of air can a fully inflated basketball hold if its radius is 5 inches? Give solution accurate to the nearest hundredth. Include correct units with your solution.
Click here to see answer by rfer(16322)

Question 479041: This is the problem:
Determine (a) the area and (b) the circumference of the circle. Use the π key on your calculator and round your answer to the nearest hundredth.
This was the answer I submitted:
r = 13mm

A = r^2 * (π)
(π) = 3.14
A = (13mm)^2 * (3.14)
A = (169mm^2) * (3.14)
A = 530.66mm^2
C = 2r (π)
C = 2 * (13mm) * (3.14)
C = (26mm) * (3.14)
C = 81.64mm
My teacher said this:
What is the area and the volume with respect to pi?
Note that "with respect to pi means you leave the answer with respect to pi", so you don't multiply by 3.14 but carry the pi.
Is she saying that it's INCORRECT? If so, where is it wrong in the steps?
Click here to see answer by mananth(16946)

Question 479158: The area of a rectangle is 48cm squared.
Each side is measured in whole centimetres.
Its perimeter could be:
A)14cm
B)26cm
C)48cm
D)52cm
Click here to see answer by Tatiana_Stebko(1539)

Question 479163: What is the area of the net that folds to make this square pyramid?
Perpendicular Height = 8cm
Base = 9cm
Click here to see answer by ccs2011(207)

Question 479261: What is the area of a circle with a radius of 2 meters? Use 22/7 for .pi

Click here to see answer by Alan3354(69443)

Question 479665: Find the surface area of a hemisphere given that the radius of the great circle is 6.2 centimeters
Click here to see answer by Alan3354(69443)

Question 479666: The base of a ladder is 15 feet away from the wall. The top of the ladder is 16 feet from the floor. Find the length of the ladder to the nearest thousandth.
20.911 feet
21.932 feet
19.800 feet
24.233 feet

Click here to see answer by nerdybill(7384)

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