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This Lesson (OVERVIEW of LESSONS on Surface Area of SPHERES) was created by by ikleyn(52781)
  About ikleyn: OVERVIEW of LESSONS on Surface Area of SpheresFor your convenience, this file contains- the list of my lessons on surface area of spheres in this site, - the formula for calculating the surface area of spheres, and - the list of relevant solved problems. SpheresA sphere is a surface in a 3D space all points of which are equidistant from one point called the center of the sphere.Figure 1a shows the sphere. A radius of a sphere is a straight segment connecting the center of the sphere with a point on the sphere surface (Figure 1b). A diameter of a sphere is the straight segment passing through the center of the sphere and connecting the opposite points of the sphere (Figure 1c).
Properties of spheres1. Every section of a sphere by a plane is a circle. 2. A tangent segment to a sphere released from a point in 3D space outside the sphere is perpendicular to the radius of the sphere drawn from its center to the tangent point. 3. All tangent segments to a sphere released from one fixed point outside the sphere have the same length. Formula for calculating the surface area of spheresThe surface area of a sphere is where My lessons on surface area of spheres in this site- Surface area of spheresunder the topic Area and surface area of the section Geometry, and - Solved problems on surface area of spheres under the topic Geometry of the section Word problems. Solved problems on surface area of spheres- Find the surface area of a sphere if its radius is of 10 cm.- Find the surface area of a sphere if its radius is of 5 cm.
My lessons on surface area of spheres and other 3D solid bodies in this site are
To navigate over all topics/lessons of the Online Geometry Textbook use this file/link GEOMETRY - YOUR ONLINE TEXTBOOK. This lesson has been accessed 2746 times. |
