Surface Area and Volume of Sphere

We often find any subjects which shape are solid figure with curve surfaces. Sometimes these objects we use as tools or games.

These are examples of objects that reflect the solid figure with curve surfaces:

bedug

kaleng

caping

bola

These objects are a reflection of solid figure with curve surfaces which are sphere, tubes, and cones. But, this web-based lesson focused on the discussion of one types of solid figure with curve surfaces, SPHERE.

Before discussing more about sphere, let us recall about the circle.

From the powerpoint above, we have been reminded of what a circle and what is the formula of circumference and area of ​​a circle. Because understanding of the circle is needed to study and understand the surface area and volume of a sphere.

SPHERE

bolaIn our daily life, there are common objects that have the shape in the form of a sphere, for example, the sphere used in various sports, such as football, basketball, baseball, billiards, volleyball, and so on. Or even use as a children’s play facilities. So the sphere is curved side close to the students’ lives.

A sphere  is a perfectly round geometricalobject in three-dimensional space, such as the shape of a round ball. Like a circle, which is in two dimensions, a sphere is the set of points which are all the same distance r from a given point in space.

For further explanation–> Sphere

Now how to calculate surface area and volume of a sphere?

SURFACE AREA OF SPHERE

Here’s a video which showing how to find the formula of the surface area of ​​sphere:

For a deeper understanding –> Surface Area of Sphere

So it can be concluded:

area

VOLUME OF SPHERE

Here’s a video which showing how to find the volume of a sphere formula:

For a deeper understanding –> Volume of Sphere

So it can be concluded:

volume

Here’s a video of an example of surface area and volume of a sphere:

Click the link Applet Surface Area and Volume of Sphere for a clearer example problems.

 

Exercise:

Determine Surface Area and Volume of Sphere

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