JB's Surface Area and Volume Post

Rectangular Prism

T = 5 x 10 = 50m
F = 6 x 10 = 60m
S = 5 x 6 = 30m
50 + 60 + 30 = 140 x 2 = 280cm²

Triangular Prism

^{9 + 8 + 10 = 27 x 5 = 135cm}

^{8 x 9 = 72 ÷ 2 = 36cm}

8 x 9 = 72 ÷ 2 = 36cm

135 + 36 + 36 = 207cm²

Cylinder

r = d ÷ 2

r = 8 ÷ 2

r = 4

c = π d

= 3.14 x 8

= 25.12mm

l x w

=25.12 x 12

=301.44mm

Circle = π r2

=3.14 x 4 x 4

=50.24mm

TSA = Circle + Circle + Rectangle

50.24 + 50.24 + 301.44 = 401.92mm²

b x h ÷ 2 x h

3 x 5 = 15 ÷ 2 = 7.5 x 8.5 = 63.75m3

l x w x h

20 x 8 x 16 = 2560cm3

b x h ÷ 2 x h

8 x 4 = 32 ÷ 2 = 16 x 6.5 = 104cm3

104 ÷ 8 = 13 x 3 = 39cm3

π x r x r x h

r = d ÷ 2

r = 12 ÷ 2

r = 6

3.14 x 6 x 6 x 15 = 1695.6cm3