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In this section, students learn to calculate surface areas and volumes of complex solids formed by combining basic solids. The section emphasizes key formulas and methods for practical applications, reinforcing previous knowledge while expanding into more complex shapes.
In this chapter, you have studied various methods for calculating surface areas and volumes of objects formed by combining different basic solids: cuboid, cone, cylinder, sphere, and hemisphere. The section emphasizes breaking down complex shapes into simpler components to find their respective surface areas and volumes accurately. Additionally, it highlights the importance of understanding the specific attributes of combined shapes, such as accounting for areas not visible or volumes that overlap.
Total Surface Area: The sum of the surface areas of all faces of a solid.
Curved Surface Area: The area of the curved part of the solid.
Volume Addition: Volumes of combined solids are simply added together.
For Total Surface Area, remember to layer, / Add it all up, it gets greater!
Imagine a robot made of blocks and balls, / Each shape adds up to fill the halls!
CATS – Curved Area, Total Surface – remember when calculating!
A container shaped like a cylinder with two hemispheres attached as its ends for carrying liquids.
A toy designed in the shape of a cone mounted on a hemisphere.
Term: Surface Area
Definition: The total area that the surface of an object occupies.
The total area that the surface of an object occupies.
Term: Volume
Definition: The quantity of three-dimensional space an object occupies.
The quantity of three-dimensional space an object occupies.
Term: Curved Surface Area (CSA)
Definition: The area of the curved surface of a three-dimensional solid.
The area of the curved surface of a three-dimensional solid.
Term: Total Surface Area (TSA)
Definition: The sum of all the surfaces of a three-dimensional solid.
The sum of all the surfaces of a three-dimensional solid.
Term: Cuboid
Definition: A three-dimensional shape with six rectangular faces.
A three-dimensional shape with six rectangular faces.
Term: Hemispherical
Definition: Half of a sphere.
Half of a sphere.
Term: Right Circular Cone
Definition: A three-dimensional shape with a circular base and one vertex.
A three-dimensional shape with a circular base and one vertex.
Term: Cylinder
Definition: A three-dimensional shape with two parallel circular bases connected by a curved surface.
A three-dimensional shape with two parallel circular bases connected by a curved surface.