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66 Answered Questions for the topic Circle

04/12/16

select a circle

select a circle . these are in circles...1,2,3,4,5,6   Assume that one circle is selected at random and each circle is equally likely to be selected. Determine the probability of selecting.   a... more

03/28/16

Equation of circle given center and tangent line

Write the equation for a circle which has its center at (1, 2) and is tangent to the line -3x+2y= 14 Solve algebraically.   I know that the equation of a circle is r2=(x-h)2+(y-k)2. So, at this... more
Circle

03/08/16

circle solid

The base of a solid is the circle x2 + y2 = 9. Cross sections of the solid perpendicular to the x-axis are semi-circles. What is the volume, in cubic units, of the solid? (2 points) 9x/4 18π 9π 72π

02/15/16

equation of the circle

Put the equation of the circle in standard form, identify the center (h,k) radius r of the circle. x2+y2-2x-12y+28=0

09/13/15

How much more pizza do you get in a large pizza that has a diameter of 1 inches than you do in a small pizza that has a diameter of 10 inches?

The teacher gives an hint. You need to find the area of each pizza.    I'm not so sure how to do this. 
Circle Math Equation

08/06/15

Which of the following is an equation of a circle in the xy-plane with center (-1,3) that passes through the origin?

Choices: A. (x-1)2 + (y+3)2 = √10 B. (x-1)2 + (y+3)2 = 10 C. (x+1)2 + (y-3)2 = √10 D. (x+1)2 + (y-3)2 = 10   Please help. Thank you!  

08/05/15

Question about a Circle, help please?

In circle O, CD = 44, OM = 20, ON = 19, CD is perpendicular to OM, EF is perpendicular to ON , (The figure is not drawn to scale.) Show your work. a. Find the radius. If your answer is not an... more

07/01/15

Circle Equation with center and radius

Which of the following is an equation of the circle with the center at (-2,3) and a radius of 5 coordinate units in the standard (x,y) coordinate plane?A) x^2+y^2 +4x-6y=5B) x^2+y^2+4x-6y=12C)... more
Circle Math Area

03/25/15

Area of a circle

Sometimes Mac takes his labrador with him to work at his autobody shop he hooks aces card to a 60 foot chain mounted on the corner of the shop which is a 40 x 80' rectangular building east enjoys... more

10/07/14

Circle Equation

2 x^2+4 x+2 y^2+12 y = 20 is the equation of a circle with and can be written in the general form (x-h)^2 + (y-k)^2 = r^2. Find h, k, and r.
Circle Circles Tangent

10/07/14

Circle Equation

Find an equation of the circle with center at (4,-6) that is tangent to the y-axis in the form of (x-A)^2+(y-B)^2=C where A, B, C are constant.   What is A, B & C?

08/29/14

What is the radius of this equation after putting it into general circle form by completing the square? 5x^2+2x+5y^2-9y-3=0

The general format of a circle equation: (x-h)^2+(y-k)^2=r^2

05/15/14

GEOMETRY - PROOF

How do I prove that three non-collinear points lie on a circle?
Circle Center

04/27/14

what is the center of a circle with the following equation?

(x-1)2+(y+2)2=49  
Circle Geometry Maths

02/11/14

Q4 c1 is the circle x² + y² -4y-20=0 and l is the line 2x-y+5=0

Q4 c1 is the circle x² + y² -4y-20=0 and l is the line 2x-y+5=0 (a) write down the centre and radius lenght of c1(b) Find the perpendicular distance from the centre of c1 to the line l in surd... more
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