Diana's Surface Area and Volume Post

Rectangular Prism




l x w, l x w, l x w
t 5 x 10 = 50m² f 10 x 6 = 60m² s 5 x 6 = 30m²

TSA= 2( T+ F + S)
TSA= 2( 50m² + 60 m² + 30 m² )
TSA= 2 (140m²)
TSA= 280m²

Triangular Prism


135cm² + 36cm² + 36cm² =207cm²
l x w
27 x 5= 135cm² (b x h) ÷ 2 TSA=207cm²
(8 x 9) ÷ 2
72 ÷ 2= 36cm²




Cylinder





2(π r²) ⁺ πdh r = d ÷ 2
r = 8 ÷ 2
r = 4 mm
2 (3.14 x 4 x 4) + 3.14 x 8 x 12
2 (50.24) + 301.44
100.48 + 301.44
TSA= 401.92mm²



v= (b x h ÷ 2) x h
v= ( 3 x 5 ÷ 2) x 8.5
v= (15 ÷ 2) x 8.5
v=7.5 m² x 8.5
v= 63.75m³

v=(l x w) x h
v=( 20 x 8) x 16
v= 160cm² x 16
v=2560cm³

v=(b x h ÷ 2) x h
v=(4 x 8 ÷ 2) x 6.5
v=(32 ÷ 2) x 6.5
v= 16 x 6. 5
v= 104cm³
3/4 = 0.375
0.375 x 104= 39cm³


v=(π r²) x h
v=(3.14 x 6 x 6) x 15
v=113.04cm² x 15
v= 1695.6cm³