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Lena [83]
3 years ago
8

Which formulas can be used to find the surface area of a regular pyramid

Mathematics
1 answer:
Art [367]3 years ago
8 0

This question is incomplete because it lacks the appropriate options

Complete Question

Which formulas can be used to find the surface area of a regular pyramid

where p is the perimeter of the base, s is the slant height, BA is the base area,

and LA is the lateral area?

Check all that apply.

a) SA = BA + 1/2ps

b) SA = 2BA + 1/2ps

c) SA = BA + LA

d) SA = BA + 2LA

e) SA = 8.LA

Answer:

a) SA = BA + 1/2ps

d) SA = BA + 2LA

Step-by-step explanation:

When finding the surface area of a regular pyramid it is important to take note of two things

A pyramid has a Base area which is always represented by BA.

a) When a regular pyramid has similar ( side)faces, for examples a regular square pyramid, which has the base of a square, the formula to use is

Surface Area = Base Area + 1/2ps

Where p = Perimeter of the side faces

s = Slant height.

b) When the side faces are not so similar , for example, we are given a triangular based pyramid, the formula we would use is given as:

Surface Area = Base Area + Lateral Area.

Therefore, the formulas we can use to find the Surface Areas or a regular pyramid are:

a) SA = BA + 1/2ps

d) SA = BA + 2LA

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3 0
3 years ago
A train goes twice as fast downhill as it can go uphill, and 2/3 feet as fast uphill as it can go on level ground. If it goes 12
Yuri [45]

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0.5hrs

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Let the speed downhill be x,

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From this info, we can obtain the actual speed,v_g on level ground as:

x=120m/h\\0.75x=v_g\\\\\therefore v_g=\frac{0.75x \times 120m/h}{x}\\v_g=90m/h

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4 0
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4 0
2 years ago
The figure below is a right rectangular prism. which expression represents the volume of the prism?
Leviafan [203]

Answer: The expression (equation/formula) for the volume of a:  

     " right rectangular prism " ;   is represented by:

____________________________________________________

                    →   " V  =  L * w * h  "   ;

____________________________________________________

in which:   all the dimensions are in the same "units of measurement" (or converted to the same "units of measurement" ;  

and in which:

      " V " is the "volume" of the right rectangular prism; in the "cubic units" ; or written as:  "units³ "  ;  or, [insert the particular units used}^ ³  "   ;

  →  that is, [units] raised to the "3rd [third] power" ; assuming these units are the same  same "fundamental units of measurement"  as the "other 2 (two) values in the expression".  

    If we are given no specific units of measurement whatsoever, then we use the generic term, "units" as the "units of measurement" ; and we express the "volume; "V" ;  of a "right rectangular prism" as:  " units ³ " ; or "cubic units" ;

        in our answer— if we are asked to solve for the:

                     "volume; "V";  of a "right rectangular prism" ;

_________________________________________________

and in which:  

            "L" represents the "length" of a "right rectangular prism" ;

            "w" represents the "width" of a "right rectangular prism" ;

            "h" represents the "height" of a "right rectangular prism" .

_________________________________________________

To given an example:

  Say we have a "right rectangular prism" ; with the given measurements:

    width , "w" :   w = 2 units;  

    length, "L"  :    L  = 3 units ;

    height, "h" :    h =  8 units.

_________________________________________________

We are asked to "find the volume " ;  of this "right recentangular prism" .

The formula for the volume;  "V" ;  of this "right rectangular prism" ;

is:

_________________________________________________

          →    Volume  =  Length * width * height ;

that is:

          →    V =  L  * w * h  ;  

Solve for the volume;  "V" .

_________________________________________________

          →   V  =  L  * w * h   ;    Now plug in the values given:

          →   V =  (3 units)  * (2 units)  * (8 units) ;

                   

                    =  3 * 2 * 8 * (units) * (units) * (units) ;

                    =  3 * 2 * 8 * units ³  ;

                    =  48 units ³ .    

_________________________________________________                    

Hope this answer— and explanation—is helpful to you!

     Wishing you the best in your academic pursuits

               — and within the "Brainly" community!

_________________________________________________

4 0
3 years ago
Read 2 more answers
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