Since we are finding the surface area of a sphere, we need the function for a circle, which we will rotate around the x axis, thus producing our sphere. If we can remember back to high school geometry, we’ll know that the equation for a sphere is x2+y2=r2 .

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3. Curved surface area = ( rl) sq. units. 4. Total surface area = ( rl + r2 ) sq. units. V. SPHERE Let the radius of the sphere be r. Then, 1. Volume = (4/3) r3 cubic units. 2. Surface area = (4 r2) sq. units. VI. HEMISPHERE Let the radius of a hemisphere be r. Then, 1. Volume = (2/3) r3 cubic units. 2. Curved surface area = (2 r2) sq. units. 3 ...

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Apr 08, 2009 · the total surface area of a hemisphere is 3 pi r^2 where r is radius. here diameter is 5 and so radius is 2.5. ie 3pi (2.5)^2. ie 3 x 6.25 x pi. 18.75 pi cm squared

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Find the surface area of a sphere of radius: 10.5 cm; 5.6 cm; 14 cm; Find the surface area of a sphere of diameter: 14 cm; 21 cm; 3.5 m; Find the total surface area of a hemisphere of radius 10 cm. (Use π = 3.14) The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it.

## Basic lesson plan template

Total Surface Area of Cylinder Surface area of cylinder is the number of square units that will exactly cover the outer surface of a cone. There are three surfaces in a cylinder, one curved and two circular bases. Total surface area of cylinder is the sum of the area of both circular bases and area of curved surface. Base area of cylinder = ΠR 2

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Use formulas to find the height of a cylinder, given the volume or surface area. %