67 Answered Questions for the topic Circle
How much does the area of the original circle increase?
A circle has a radius of A meters. If the radius doubles,how much does the area of the original circle increase?
How much of the field is being watered ?-It's a rectangle-it's 92 circles inside-diameter is d=50ftarea of the rectangle (550ft x350ft=192,500) minus the area of the circle,then divide.
Finding the equation of a circle with a curvature equal to the curvature of a given curve at a point
"Find an equation for the circle of curvature of the curve r(t)=8t i + sin(5t) j at the point (4pi,1). (the curve parameterizes the graph of y=sin(5/8X) in the xy plane) Ive already found v(t)=8... more
What Fraction of The Circumference Radians
4pi/3 Describe what fraction of the circumference of a full circle is spanned by an angle with the given measure
Tangent Line and Circle
Find the values of c such that the line with equation y=2x+c is a tangent to the circle with equation x^2+y^2=25.
OAB is a sector of a circle of radius 8cm and centre O. The length of the arc AB Is 8cm. Find the area of the sector
It has a diameter with endpoints A(-1,4) and B(4,2)
HELP, Please! Math :open ended explain
What is the surface area and volume of the sphere shown below?
I need to work out the elipse a half circle that is vertical leaves on to a pitched surface
Say the half circle had a radius of 800mm and it was casting back of to a pitched line of 45 degrees it would leave an elipse how do i work that out ? And is therr a set formula so i can change... more
Horizontal Height in a Circle in terms of Time
Background: a Ferris Wheel has a diameter of 135 feet and a maximum height of 150 feet. Its ride duration is 10 minutes and it makes two complete rotations in this time. Assume that at time t = 0,... more
How would you rotate a circle?
I know you logically don't have to, since it is a circle after all, but what would the formula be (in standard form) for a cicle (or semicircle I suppose) turned by, say, π/2 (90°)?
How do you convert a shifted parametric circle equation to rectangular form?
x=-2cos((1/2)t-(π/2))+23y=2sin((1/2)t-(π/2))+6specifically, how do you separate the stuff inside the cos/sin parenthesis to eliminate a parameter? I find all kinds of solved simple circle... more
Raidus of a Circle With Given Information
A chord is 48cm and another chord is 40cm. The 48cm chord is 8cm closer to the center of the circle than the 40cm chord. What is the radius of the circle?
Circle diameter and revolution
A wheel of a compact car has a 25-inch diameter. The wheel of a pick up truck has 31-inch diameter. To the nearest inch, how much further does the pick up truck wheel travel in one revolution than... more
Trigonometry and equation of a circle
Consider the circle with equation x^2+y^2-4y=0 and the point P(5,2). Draw a diagram to show the circle and the two lines from P that are tangent to the circle. Find the angle between the two... more
Radius √14 and center (−6,−7)
Find the standard form of the equation for the circle with the following properties.
Finding Perimeter and Area on a cross section
I don't really get how cross-section works. So um, this is the problem: "You cut the cake vertically to make two congruent parts." Image: https://i.imgur.com/QfyZQ8d.png A) Find the... more
standard equation of a circle given endpoints of diameter are (-2,3) and (6,-4)
standard equation of a circle given endpoints of diameter are (-2,3) and (6,-4) for my precal assignment, i just want to check my answer:)
Find the standard form for the equation of a circle with a diameter that has endpoints (0,-3) and (1,2)
A sector with central angle θ is cut from a circle of radius R = 24 inches, and the edges of the sector are brought together to form a cone.
A sector with central angle θ is cut from a circle of radius R = 24 inches (see figure), and the edges of the sector are brought together to form a cone. Find the magnitude of θ such that the... more
Circle General Equation
what is the general equation for (0,0) with the radius of 5
The diameter of circle A is the same as the radius of circle B. If the sum of their circumferences is 81pi. What is the diameter of circle B?
Circumference = 2 pi r