Volume of Spheres Objective: 1) To find the volume of a sphere.
Spheres Sphere – The set of all points in space equidistant from a given point. Center r Radius – Is a segment that has one the center & the other endpt on the sphere. Diameter – A segment passing through the center w/ both endpts on the sphere.
Volume of a sphere V s = (4/3) r 3 Radius of a sphere r
Ex.3: Find the volume of the following sphere. 30m V s = (4/3) r 3 = (4/3) (15) 3 = (4/3) (3375) = 4500 = 14137m 3
25What is the volume of a sphere with a radius of 8 ft?
26What is the volume of a sphere with a diameter of 4.25 in?
Find the volume of the sphere. Leave your answer in terms of. V = r 3 Use the formula for the volume of a sphere = 15 3 Substitute r = = = 4500Simplify. The volume of the sphere is 4500 cm 3. Surface Areas and Volumes of Spheres Lesson 11-6 Quick Check Additional Examples 11-6 Finding Volume
2 cm Volume of a Sphere (round to the nearest hundredths)
10 cm Volume of a Sphere
5 in Volume of a Sphere A spherical balloon has an initial radius of 5 in. When more air is added, the radius becomes 10 in. Explain how the volume changes as the radius changes. 10 in