Elijah's Surface Area Growing Post

Rectangular Prism :

Rectangular Prism net:

Formula :

L x W = a
# x # = a
#cm = a

L x W = a
# x # = a
#cm(2) = a

TSA
= S1 + S2 + S3
= # + # + #
=tsa .



Solution :

Triangle Prism :

Triangle Prism net :
Formula :

area of rectangle :
= L x W
= # x #
= # cm

area of triangles :
= b x h / 2
= # / 2
= # cm(2)

TSA
=S1 + S2 + S3
=# + # + #
=#cm

Solution:

Cylinder:

Cylinder net:

Formula:

First find the cicumference of the circle to get the length of the rectangle.

πd = c
3.14 x # = c
# = c




Then find the area of the circle.

If you're given the diameter. You have to find the radius first.

d/2 = r
#/2= r
# = r

area of circle:
π x r x r = area of circle
3.14 x # = area of circle

# cm (2) = area of circle

Then find the Lateral Area of the square.

L x W= L.A

# of circle circumference x #= L.A
# cm= L.A

TSA
= circle + circle + L.A
= # + # + #
= # cm(2)

Solution:

Video :