Rectangular prism:
Top:
A= lxw
A= 6x10
A= 60
A= 60x2
A= 120cm(2)
Side:
A= lxw
A= 2x10
A= 20
A= 20x2
A= 40cm(2)
Front:
A= lxw
A= 2x6
A= 12
A= 12x2
A= 24cm(2)
TSA: 120+40+24
TSA: 184cm(2)
Formulas:
lxw
The Net:
Triangular Prism:
Front:
A= bxh/2
A= 5x10/2
A= 5x10/2
A= 25
A= 25x2
A= 50cm(2)
Top:
A= lxw
A= 2x15
A= 30
A= 30x2
A= 60cm(2)
Side:
A= lxw
A= 5x2
A= 10
A= 10
A= 10x2
A= 20cm(2)
TSA: 50+60+20
TSA: 130cm(2)
Formula's:
lxw
bxh/2
The Net:
Cylinder:
(5cm)
R= d/2
R= 5/2
R= 2.5cm
C= (pi)d
C= 3.14(5)
C= 15.7cm
(10cm)
A= lxw
A= 15x15.7
A= 235.5cm(2)
A=(pi)rr
A= 3.14x 2.5 x 2.5
A= 19.625cm(2)
TSA: 19.625+19.625+235.5
TSA: 274.57
Formula's:
R=d/2
C=(pi)d
A= lxw
A= (pi)rr
The Net:
My Video on how to calculate surface area with: Karra and Stephanie
PLEASE COMMENT if there are any mistakes (:
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