What is the formula to volume and surface area?

1 answer:

8 0

Volume of a rectangular prism: length*width*height.
Volume of a cylinder: pi*radius*radius*height
Volume of a triangular prism: (base*height*length) / 2
Volume of a Pyramid: (length*width*height) / 3
Volume of a cone: (pi*radius*radius*height) / 3
Volume of a sphere: 4/3*pi*radius*radius*radius

Surface Area: A<span>dd the areas of all the faces of the three-dimensional figure.
(Draw a net)

Hope this helped☺☺</span>

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Anyone know the area?

Elina [12.6K]

Answer: The area of the triangle is: " 8.5 cm² " ;

or, write as: " 8 $\frac{1}{2}$ cm² " .
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Explanation:
_________________________________________________________
The formula {"equation"} for the area of a triangle is:

A = ( $\frac{1}{2}$ ) * b * h ;

in which: A = area;
b = base;
h = [perpendicular] height;
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{also, can be written as: " A = (b * h) / 2 " .}.
______________________________________
Solve for the area, "A" ; by plugging in the known values shown in the figure (image attached):
______________________________________
base, "b" = 13 cm ;
[perpendicular] height, "h" = 5 cm ;
______________________________________
A = (b * h) / 2 ;

= (13 cm * 5 cm) / 2 ;

= [ (13 * 5) cm²] / 2 ;

= 65 cm² / 2 ;

A = " 8.5 cm² " ; or, write as: " 8 $\frac{1}{2}$ cm² " .
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Answer: " 8.5 cm² " ; or, write as: " 8 $\frac{1}{2}$ cm² " .
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