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Mathematics 15 Online
OpenStudy (anonymous):

what is the surface area if the regular pyramid below pic in comments

OpenStudy (anonymous):

OpenStudy (nincompoop):

surface area is the sum of all the surfaces do you know the formal for the area of a triangle and square?

OpenStudy (anonymous):

[Base Area] + 1/2 × Perimeter × [Slant Length]

OpenStudy (nikato):

Can you find the area of the base which is a 14 by 14 square?

OpenStudy (anonymous):

196

OpenStudy (nikato):

Yes. And what about a triangle with a height of 18 and a base of 14?

OpenStudy (anonymous):

umm idk?

OpenStudy (nikato):

Triangle= (base x height)/2 So (18 x 14)/2= 252/2 = ?

OpenStudy (nikato):

Yea. So 126 is the area of ONE triangle, but since you have multiply, multiply that by 4 and then remember to add the area of your base(the square) to find the surface area

OpenStudy (nikato):

*since you have four

OpenStudy (anonymous):

692?

OpenStudy (nikato):

No. Try again.

OpenStudy (nikato):

692 isn't even an answer choice. 126(4) + 196

OpenStudy (anonymous):

ooh got it thanks

OpenStudy (nikato):

No problem

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