Net :

Formula:

- l x w = a
- # x # = a
- #cm(2) = a

= S1 + S2 + S3

= # + # + #

= #cm(2)

Solution:

Triangular Prism:

Net:

Formula:

- Rectangles.

- l x w = a
- # x # = a
- #cm(2) = a

- b x h / 2 = a
- # x # / 2 = a
- # / 2 = a
- #cm(2) = a

= # + # + # + # + # = #cm(2)

Solution:

Cylinder:

Net:

Formula: First, we need to find the circumference of the circle to get the length of the rectangle.

- πd = C
- 3.14 x # = C
- # = C

- If we were given the diameter of the circle, we have to find the radius.

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

- π x r x r = A
- 3.14 x # x # = A
- #cm (2) = A

- L x W = L.A
- # x # = L.A
- #cm = L.A

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

Solution:

Video:

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