Surface Area Growing Post

Rectangular Prism:

T F S

A=LxW A=LxW A=LxW
A=18.5x13.5 A=18.5x5 A=5x18.5

A=249.75cm² A=92.5cm² A=92.5cm²

TSA=249.5+249.5+92.5+92.5+92.5+92.5=870cm²

Triangular Prism:

B T F S

A=BxH A=LxW A=LxW A=LxW

A=3x9.1 A=6.4x9.1 A=4.5x9.1 A=6.4 x 3

A=27.3cm² A=58.24cm² A=40.95cm² A=19.2cm²

TSA=27.3+27.3+58.24+58.24+40.95+40.95+19.2+19.2=290cm²

Cylinder:

D÷2=r A=2 x pi x r² A=pi x D x H

12 ÷2=6mm A=2x 3.14 x 6 x 6 A=3.14x12x17
A=226.08mm² A=640.56mm

TSA=226.08+640.56=866.64mm²

-JOHN!