Knowing the volume of a prism would be helpful in real life for someone at a packing company needing to know how much packing foam to put in a pcakage. It would also be helpful for a pizza company knowing how big to make it so that a a pizza will fit, or a person who wanted to fill a fish tank.
Often we need to know how much of a solid, liquid, or gaseous matter a container can contain. Taking the example of the soda can further, suppose you want to know how much soda a cylinder of certain measurements can contain, you simply insert the measurements of the cylinder into the formula and you have your answer! A cylinder is one of the most common types of containers which we can see around and hence, there is a need to find the volume of a cylinder.
Imangine this, you area a brilliant painter of picaso potential. You are painting a house and you need to know how much paint you will need. First, you need to find the surface area of the prism shaped house. You will need to know how to find that surface area. Then once you find that, you will know just how much paint you will need to complet the house. Another example is if you are a roof constructor and you have to put shingles on a house. You need to find the surface are of the roof so that you know how many shingles you need.
Suppose a water tank in the shape of a right circular cylinder is thiry feet long and eight feet in diameter. How much sheet metal was used in its construction? This is an exampleo f a real life application for finding the surface are of a cylinder. Anyone from a lumber to a painter would need ot know the formula. A painter would need the formula so that they can decide how much paint they need to get if they are painting an object in the shape of a cylinder.
Also, someone who makes toys would need to know how much material is needed if they were making an object in the shape of a cylinder. Surface area can also be used if you are trying to find out how much wrapping paper to wrap a gift. Surface area is used for many things rom gifts to plumbing.
Many of us have played with a soccer ball before and have been interesed in its shape. I used to think that all the faces on such a ball were hexagons. However, after carefully studying it, I realized that even though some faces have six edges, there are many that hagve five edges also. to be exact, a soccer ball is a polyhedron that consists of 12 regular pentagons and 20 regular hexagons. A soccer ball is an example of a polyhedron.
In a real life situation you can use inscribing a figure in a circle to help inscribe a photo onto a circular key chain. In this situation say you want a picture of your family on a key chain if you have it inscribed the picture can be whatever size and all you would have to do is take it to the shop have it inscribed and you would have key chain with your family photo.
Area of a circle
The area of a circle is the number of square units inside the circle. You could use this if you worked at pizza hut and wanted to know how much toppings would fit on a certain pizza, also if you wanted to garnish food it would be helpful to know what to put on and how much.
Circumference, diameter and radii are measured in linear units, such as inches and centimeters. A circle has many different radii and many different diameters, each passing through the center. A real-life example of a raduis is the spoke of a bicycle wheel. A 9 inch pizza is an example of a diameter: When one makes the first cut to slice a round pizza pie in half, this cut is the diameter of the pizza. So a 9 inch pizza has a 9 inch diameter.
You are an architect. You have been asked to help design the seating for a movie theater that is in a circular shape. You must design the seating so that all of the seats will provide an acceptable view of the screen. You will be given parameters for what constitutes an acceptable view. How can you make sure that every seat in the theater is correctly placed? You will need to find the measure of the inscribed angle so that all the seating can see the screen completely.
The radius of a circle is the distance from the center of a circle to any point on the circle. If you place two radii end to end in a circle, you would have the same length as one diameter. Thus, the diameter of a circle is twice as long as the radius.
Pi is the relationship fo the circumference of a circle to the diameter. Thus for any circle, if you divide the circumference by the diameter, you get a value close to 3.14.
When the pentagon was built the original figure was supposed to be a circel but they over estimated the area of the land to the circumference of the circle and ended up with a pentagon.