Volume of Rectangular & Triangular Prisms
STAAR Chart Formula V = Bh*
*where B equals the area of the base
Since the base shape of a rectangular prism is a rectangle, we replace B with the formula for the area of rectangle which = bh.
Giving us … V = (bh)h
1. Figure name______________
Shape of base?
rectangle
Height of figure 10 in
V = Bh
V = (bh)h
V = (4·3)(10)
V = 12·10 = 120 in³
3in4in
10 in
Rectangular prism
1. Figure name______________ Shape of
base?
square
Height of figure
3 in
V = Bh
V = (bh)(h)
V = (3·3)(3)
V = 27 in³
3in3in
3 in
cube
Volume of Triangular Prisms
STAAR Chart Formula V = Bh**where B equals the area of the base and h equals the distance between the basesSince the base shape of a triangular prism
is a triangle, we replace B with .
Specific formula:
bh21
hbh21
V
1. Figure name______________
Shape of the base?
triangle
Height of figure
10 cm
V = Bh
V = (½bh)(h)
V = (½ ·3·4)(10)
V = 6·10 = 60 cm³
3 cm
4cm
10 cm
triangular prism
1. Figure name______________ Shape of
base?
triangle
Height of figure 10 m
V = Bh
V = (½ bh)(h)
V = (½ · 6 · 4)(10)
V = 12 · 10 = 120 m³
6 m
10 m
4 m
triangular prism
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