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The area of a circle if the diameter was s 7ft is 38.48ft
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Consists of the endpoints of a diameter of a circle and all points of the circle that lie on one side of the diameter starts with s?
Semicircle
For a circle inscribed in a square what is the ratio of their areas?
For a circle inside a square, the diameter is the same as the side length, and the area of the circle is about 78.54% of the square's area (pi/4). A(c) = 0.7854 A(s) The area of the square is L x L. (For a square, L = W). The area of the circle is PI x R^2, where R = L/2. Let's express the area of the square using A = L x L = (2R) x (2R) = 4 R^2 So, the ratio of the area of the circle to that of the square is: pi/4 or about 0.7854.
What is the surface area of a cylindrical ring if its outside diameter is 16 mm and its inside diameter is 10 mm?
S=pi x dxD S=3.14 x 3 x 40,82 S=384,5244 or rounded 385 mm
What is the formula to find the surface of a barrel?
The barrel is probably much like a cylinder. All surface area is the lateral area+the area of the base(s). In this case: SA=(d)("pi")(h)+(2)("pi")(r2) SA is surface area d is diameter of the circle base h is the height r is the radius of the base What you are doing with this equation is figuring out the circumference x the height, so you get the area of the tall part. Then you take the area of one of the bases and multiply it by 2.
What is the formula for the surface area of a cone?
Area = πSr + πr² Where: S = the slant length of the cone r = radius of the base πr² = area of the base of the cone πSr = area of outside of cone -------------------------------------------------------------- The surface area of the cone is the sum of the area of the base and the slanted surface. The area of the base is the area of a circle = πr² The area of the slanted surface can be calculated by realising that if the slanted surface is cut by a straight line from the apex to the base it can be "unrolled" into a sector of a circle. Thus it is a fraction of the area of a circle. The length of the circumference of the sector is the length of the circumference of the base of the cone; the length of the whole circle from which this is a sector is the circle with radius of the slant height of the cone; thus: area slanted surface = πS² × ((2πr)/(2πS)) = πSr Thus the surface area of a cone = area base + area slant surface → surface_area_cone = πr² + πSr = πr(r + S) where r is the radius of the base and S is the slant height.
