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Tutors Answer Your Questions about Circles (FREE)
Question 148554: an equilateral triangle is inscribed in the circle of radius 1 centered at the origin (the unit circle). if one of the vertices is (1,0), what are the coordinates of the other two? The three points divide the circle into three arcs; what are the angular sizes of these arcs?
Click here to see answer by Alan3354(6092)   |
Question 148880: I'am an online student and I have the following Questions
True or False. If the radius of a circle is doubled, the area increases by a factor of 4.
True or False. Increasing the radius of a circle by 10 inches, increases the circumference of the circle by 20 inches.
Find the perimeter of a region bounded on three sides by a rectangle with a length of 1000 ft and a width of 600 ft and bounded above by a semicirle with a radius of 300 ft. Use 3.14 as the approximation for ( Do not include the lower half of the semicircle in the perimeter)
A)3542 ft
B)3592 ft
C)3502 ft
D)3522 ft
Find the perimeter of an equilateral triangle (all sides have equal lengths) with side lengths 4 mm
Click here to see answer by nerdybill(2446)  |
Question 149472: ice cream scoops are often 1.25 inches in diameter. how many scoops should you get from a half gallon of ice cream? a half gallon container can be approximated by a cylinder with a diameter of 4.8 inches and a height of 6.5 inches.
Click here to see answer by nerdybill(2446) |
Question 149467: There is a park 27 feet wide that is between two buildings whose heights are 123 feet and 111 feet. two teachers, mr. naeher and ms. snyder are standing on top of the shorter building looking at a rare bird percheed on top of the taller building. If dr. naeher is 74 inches tall and ms. snyder is 62 inches tall, who has the samller angle of elevation while looking at the bird?? What are these angles.?
THANKS!!! :]
Click here to see answer by tryin2bhelpful(6)  |
Question 150278: Find the equation of the circle described each.
a)The circle is tangent to both coordinate axes and contains the point (6,3).
b)The circle is circumscribed about the triangle whose vertices are (-1,-3),(-2,4),and (2,1).
c)The sides of a triangle are on the line 6x+7y+11=0,2x-9y+11=0,and 9x+2y-11=0.Find the equation of the cirlce inscribed in the triangle.
(looking forward for someone who will asnwer this..ty in advance =)
Click here to see answer by Edwin McCravy(2922) |
Question 156885: 18.When blown up, a beach ball has a diameter of 1 foot. How much air is needed to blow up the beach ball? The volume of a sphere is V = 4/3 π r3, where r is the radius (the radius is ½ of the diameter). Leave your answer in terms of π. Give your answer in cubic feet.
Click here to see answer by nerdybill(2446) |
Question 157622: I have a sphere with a diameter of 88,846 miles, and another sphere with a diameter of 7,926 miles. how would i find the surface area to compare, and then eventually find the ratio between the surface areas?
then, using the same numbers, i need to find the ratio of their volumes?
which means i need to know how to find their volumes.
i know the formula for surface area is SA=4(3.14159)r^2
or surface area=four times pi times the radius squared.
then the volume formula would be volume=4/3 times pi times radius cubed (^3)
i dont know if this makes ANY sense... but i dont understand why everytime i calculate such big numbers on my calculator, it says something about "E+11" at the end.. i dont understand it.
HELP?
:)thanks.
Click here to see answer by nerdybill(2446) |
Question 161159: GPS Satellites orbit 12,500 miles above the surface of the earth. Point A represents the position of a satellite. Line segments AB and AC are externally tangent to the earth touch the earth at points B and C. Segment AB = 15,977 miles from point A(satellite) to point B(edge of earth). Line segment AE represents a line from the center of the earth to the orbiting satellite. Line segment DE, which is a portion of segment AE, represents the radius of the earth. The question is, What is the radius represented by line segment DE?
If AB = 15,977 then BC also equal 15,977, right... I am not sure how to find the diameter in order to get the radius...
This question if for extra credit and not from a text book...
Thanks for all you help!
Click here to see answer by scott8148(3382)  |
Question 163807: can you please help me solve these questions:-
1. "what is the equation of the circle who touches the negative x- and y-axes and also the line "
2." what is the equation of the circle who passes through the points (1,4),(7,5),(1,8)?"
3."what is the equation of the circle who has its centre on the line  and passes through the origin and the point (4,2)?"
Click here to see answer by Edwin McCravy(2922) |
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