Question

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Answer 1

Hello!

The answer is:

The surface area of the most common geometrical shapes are:

• $Circle=\pi *r^{2}$
• $Triangle=b\frac{h}{2}$
• $Rectangle=b*h$
• $Cube=6*a^{2}$
• $RectangularPrism=2*l*w+2*l*h+2*w*h$
• $RigthCircularCilynder=2\pi *r^{2}+2\pi *r*h$
• $Sphere=4*\pi *r^{2}$
• $RightCircularCone=\pi *r^{2}+\pi *r*(\sqrt{h^{2} +r^{2}})$

Why?

The area can be defined as the sum of the areas that cover the surface of an object or shape, and it's expressed in squared units.

There are the formulas for the surface area of the most common geometrical shapes.

Circle,

$Circle=\pi *r^{2}$

Where:

$\pi =3.1416\\r=radius$

Triangle,

$Triangle=b\frac{h}{2}$

Where:

$b=base\\r=height$

Rectangle:

$Rectangle=b*h$

Where:

$b=base\\r=height$

Cube,

$Cube=6*a^{2}$

Where:

$a=SideLength$

Rectangular Prism,

$RectangularPrism=2*l*w+2*l*h+2*w*h$

Where:

$l=length\\w=width\\h=height$

Right Circular Cilynder,

$RightCircularCilynder=2\pi *r^{2}+2\pi *r*h$

Where:

$\pi =3.1416\\r=radius\\h=height$

Sphere,

$Sphere=4*\pi *r^{2}$

Where,

$\pi =3.1416\\r=radius$

Right Circular Cone,

$RightCircularCone=\pi *r^{2}+\pi *r*(\sqrt{h^{2} +r^{2}})$

Where:

$\pi =3.1416\\r=radius\\h=height$

Have a nice day!