Surface Area Growing Post

Here is my Growing Post for Surface Area

RECTANGULAR PRISM :

Here is the formula to calculate the area of a rectangular prism

a = l x w
a = 2 x 8

a = 16cm²

a = l x w

a = 2 x 2

a = 4cm²

TSA

= (bigger rectangle)+(bigger rectangle)+(bigger rectangle)+(bigger rectangle)+( smaller rectangle) + (smaller rectangle)
= 16 + 16 + 16 + 16 + 4 + 4

= 72cm²

TRIANGULAR PRISM :

Here is the formula to calculate the area of a triangular prism

a = b x h ÷ 2

a = 7 x 4 ÷ 2

a = 18cm²

Here is the formula to calculate the area of a rectangular prism

a = l x w

a = 3 x 7

a = 21cm²

a= l x w

a = 3 x 8

a = 24cm²

a= l x w

a= 3 x 4

a = 12cm²

TSA

= (triangle)+(triangle)+(rectangle)+(rectangle)+(rectangle)
= 18+18+21+24+12

= 73cm²

CYLINDER :

Here is the formula to calculate the radius

r = d ÷ 2

r = 6 ÷ 2

r = 3cm²

Here is the formula to calculate the area of a cylinder

sa = 2 x (pi x r²) + (pi x d x h)

sa = 2 x 3.14 x 3 x 3 + 3.14 x 6 x 7

sa = 56.52 + 131.88

sa = 188.4 cm²

So that's my " growing post " for " surface area " ... hope you liked it and feel free to comment. byee