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If the diameter of a circle is 8 feet the radius will be?
The radius would be 4 feet I know this because the diameter is always 2x the size of the radius.
Are all diameters of a circle equal?
By definition, yes! Geometrically speaking, a diameter is a chord which passes through the center of the circle. Also, it is 2x the radius of the circle. Since the radius remains constant for a given circle, so is the diameter.
What is the centre and radius of a circle whose equation is 2x2 plus 2y2 plus 2x -6y -9?
Equation of circle: 2x^2 +2y^2 -2x +2x -6y -9 = 0 Dividing all terms by 2: x^2 +y^2 +x -3y -4.5 = 0 Completing the squares: (x+0.5)^2 + (y-1.5)^2 = 7 Centre of circle is at (-0.5, 1.5) and its radius is the square root of 7
Is a diameter the length of the radius multiplied by pi?
Wrong. It's 2x the radius. The circumference is 2 x radius x Pi
Find area of a circle?
To find the area of a circle you must know the radius or diameter. The diameter is 2x the radius so the radius is 1/2 the diameter. For example, if the diameter is 6, the radius is 3. Next you must square the radius. For our instance, 3 squared is 9. ( 3x3=9) Now you must multiply the squared radius by pi.9 x 3.14= 28.26. (3.14 because it is pi rounded) The area of the circle with a radius of 3 is 28.26. We rounded pi to get 3.14. The formula is A=Pi r2.
