1. The document is a lesson on calculating volume for rectangular prisms and triangular prisms. It provides the formulas for volume (V=l×w×h for rectangles, V=B×h for triangles where B is the area of the base) and examples of using the formulas. 2. Students are asked to practice calculating volumes of different shapes using the given formulas and by finding the area of various bases for triangular prisms. 3. The lesson defines key terms like volume and provides the volume formulas to use for different shapes.

1. Name ________________________________ Date __________________
Mrs. Labuski / Mrs. Rooney Period _____ Lesson 10-8 Volume
VOCABULARY DEFINITION EXAMPLE
The number of cubic units
needed to fill a space.
VOLUME Formula =
(of rectangular length x width x height
prism)
V=lxwxh V=3x2x4
Answer is always written V = 24 units3
in units3 or cubic units.
V = Bh
VOLUME notice the capital B!
(of triangular B = area of the base See back of notes page
prism)
Answer is always written
in units3 or cubic units
Now you try:
Find the area
of the main
shape in front
V=lxwxh V=lxwxh
(base) and
then multiply
V=4x2x3 V = 12 x 10 x 8 that by the
V=8x3 V = 120 x 8 height of the
main figure
V = 24 V = 960
V = 24 ft3 V = 960 yd3

2. To find the volume of a triangular prism
V = Bh
(think of capital B as A – Area)
First find the area of the base.
A=½x5x4
A = ½ x 20
A = 10 (= B)
Then multiply the result by the height of the prism.
V = Bh
V = 10 x 3
V = 30 un3
V = Bh V = Bh
(B=Area of bases:) (B=Area of bases:)
A=½x4x2 A=½x3x2
A=½x8 A=½x6
A = 4 (= B) A=3
V=4x4 V=3x5
V = 16 un3 V = 15 un3

3. Name ________________________________ Date __________________
Mrs. Labuski / Mrs. Rooney Period _____ Lesson 10-8 Volume
VOCABULARY DEFINITION EXAMPLE
VOLUME
(of rectangular
prism)
VOLUME
(of triangular
prism)
Now you try:
V=lxwxh V=lxwxh
V = ___________ V = ___________
V = ___________ V = ___________
V = ___________ V = ___________
V = ___________ V = ___________

4. To find the volume of a triangular prism
V = Bh
First find the area of the base.
A = _________
A = _________
Then multiply the result by the height of the prism.
V = Bh
V = ___________
V = ___________
V = Bh V = Bh
(B=Area of bases:) (B=Area of bases:)
A = ½(bh) A = ½(bh)
A = _________ A = _________
A = _________ A = _________
V = __________ V = __________
V = __________ V = __________