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Note that:

r - radius

h - height

l - lateral height

b - base

a- base edge

Cone:

Surface Area : πr (r+l) o r πr (r+√(r²+h²)

Volume: πr² (h/3)

Cylinder:

Surface Area: 2πr² + 2πrh

Volume: πr²h

Square Pyramid:

Surface area: a² + 2a√(a²/4 + h²)

Volume: a²(h/3)

Triangle:

Perimeter: a+b+c (a,b, and c are the lengths of the sides)

Area: b*h/2 or √s(s-a)(s-b)(s-c) <= This is the Heron's formula where s is the semiperemeter or half the perimeter.

r - radius

h - height

l - lateral height

b - base

a- base edge

Cone:

Surface Area : πr (r+l) o r πr (r+√(r²+h²)

Volume: πr² (h/3)

Cylinder:

Surface Area: 2πr² + 2πrh

Volume: πr²h

Square Pyramid:

Surface area: a² + 2a√(a²/4 + h²)

Volume: a²(h/3)

Triangle:

Perimeter: a+b+c (a,b, and c are the lengths of the sides)

Area: b*h/2 or √s(s-a)(s-b)(s-c) <= This is the Heron's formula where s is the semiperemeter or half the perimeter.