AB is diameter of a circle APB with radius 5cm.If AP = 6cm find the length BP?
477225
Since angle in a semicircle is right, angle (APB) = 90 \n\n=> APB is right angle triangle with hypotenuse as AB = 10 cm and other side AP = 6 cm,\n\napplying Pythagoras theorem,\n\nBP^2 = AB^2 - AP^2 = 100-36 = 64 => BP = 8 cm
658093
Given the nature of the values I am assuming they are identifying the circumference.    \nC = 2 * pi * radius = pi * diameter.   \nSo, to find the diameter we would divide out the pi or use 3.14 to get to the diameter for each value.  \nHope this helps.
511828
I want to point out first that the formula for perimeter of a circle is (pi)d or 2(pi)r, not (pi)r^2- (pi)r^2 is for the area!\n\nAnyway, P= (pi)d\n         = 8pi\nDivide that by two since it's just a half circle\n         =4pi\nAdd 8 to that, and there you have it, the perimeter!\n\nFinal Answer- 4pi+8 or 20.56cm^2
183956
Half the diameter, or circumference divided by 2.pi
392733
Divide the circumference of a circle its diameter.
39475
Diameter of a circle, I'm assuming?\n\nDiameter = 2 * Radius\nDiameter = Circumference / (2 * pi)\nArea = pi * (diameter / 2)^2
492563
This cannot be the whole question.  Since you are using the letters r and d, I will assume you are talking about radius and diameter.\nAre you trying to find the area? then use the formula\nA = Pi*r^2\nIf you are trying to find circumference, then use\nC = 2*Pi*r\nRemember that d = 2r (diameter is twice the radius)
796855
if you mean an ellipse....\n\narea is equal to pi * minor radius * major radius
1008862
circumference = pi * D\n\nwhere D is the diameter.
383882
Lets do the math:\n5.5 inches around (Circumference = C)\n(Diameter = D)\n(π = Pi)\n\nD = (C/π)\nD = (5.5/π)\nD ≈ 1.751 inches\n\nSo, your member is 7 inches long, it is 5.5 inches around (Circ), 2 inches wide at the top, but it is 1.75 inches wide at the point you measured the circumference.  Since the 2 inch measurement was at the top, then the 1.75 inch measurement must have been below that.  So your member grows a quarter of an inch the longer it gets.  That is one interesting "member."  Maybe you should pull that ruler out and get a little better measurements.
71470
3.1416 X radius squared\n12" circle= 6" radius\n6" X 6" = ? X 3.1416(pi)= ?\nGot the picture?\nNot going to do your homework for you.\n\n(sorry Lucky Lady but pi X diameter is the circumference)
634060
The length of one side of the rectangle can be related to the Circumference of the circle.\nTo get the perimeter of a circle, called the circumference of the circle, one simply has to multiply 2 times pi (about 3.14) times the radius of the particular circle. \nThe circumference of a circle can be calculated from its diameter using the formula:\nc = πd\nOr, substituting the radius for the diameter:\nc = 2πr\nWhere r is the radius and d is the diameter of the circle, and π (the Greek letter pi) is the constant 3.141 592 653 589 793...
470650
diameter = 9 inches\n\nRadius = 4.5 inches\n\npi * r^2 = 3.14159 * 4.5^2 = 63.61725...
860968
u can use the following formulas to find the radius\n1)Area of circle=pi.*(radius)^2\nwhen area is given plug in that value into this formula and u can get the radius\n2)radius=diameter/2\nwhen the diameter is given,find the radius by dividing the diameter by 2\n3)circumference=2*pi.*r\nwhen the circumference is given use the above formula to solve for the radius\n\nthere is no definite formula for the radius but depending the other value given u can solve for the radius.\nhope that helps!!!
234883
The symbol p is called pi and is approximately equal to 22/7 or 3.141592654 , most high school teachers use it to two decimal places as 3.14\np is the ratio between the circumference and the diameter of a circle ..i.e \np = (circumference / diameter ).\nInterestingly the value of p is the same for any circle ... \n\nArea of circle = p x ( radius x radius ) = p radius2\n\nif the Radius = R \nthen \nArea of circle = pR2 = p x R x R \n\nHere's an example:\nFind the area of the circle with radius 10 cm ..use p as 3.14\nAnswer\nHere we have :\nRadius = 10 cm\np = 3.14\n\nUsing the formula Area of circle = p radius2 = p x radius x radius \n\nreplacing radius with 10 cm and p with 3.14 in above formula we have\n\nArea of circle = p radius2 = p x radius x radius = 3.14 x 10cm x 10cm = 3.14 x 100 cm2 = 314 cm2
237156
Pi * r^2\n\n(Pi R Squared)\n\nwhere R is the radius (which is also equivalent to half the diameter)
522790
Circumference = 2*radius*pi\n\nTherefore, the radius is 30\n\nand the diameter is 60..\n\nHope that helps...