How do you do surface area and volume?

2 answers:

5 0

Depending on what shape or figure you are talking about, generally volume= Bh B= area of the base and for area greatly depend on what the object is.
square= side cubed
rectangle= L time H
triangle= base time height divided by 2
circle= pi time radius cubed
that should get you through what you need.

marissa [1.9K]3 years ago

4 0

Prism; Surface area = Lateral Area + 2(base)
Volume = Base times height
Cylinder; surface area = lateral area + 2(base)
Volume = Base times height
Pyramid; Surface area = Lateral times base
Volume = 1/3 base times height
Cone; Surface area= Lateral area + base
Volume= 1/3 base times height

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Let G denote the centroid of triangle ABC. If triangle ABG is equilateral with side length 2, then determine the perimeter of tr

zhannawk [14.2K]

We know from Euclidean Geometry and the properties of a centroid that GC=2GM. Now GM=sin60*GA= $\sqrt{3}$ . Hence CM=GC+GM=3* $\sqrt{3} /$ . Now, since GM is normal to AB, we have by the pythagoeran theorem that:
$AC^2=AM^2+GM^2=BM^2+GM^2=BC^2$
Hence, we calculate from this that AC^2= 28, hence AC=2* $\sqrt{7}$ =BC. Thus, the perimeter of the triangle is 2+4* $\sqrt{7}$ .