Mrs.D Math · 6th Grade

BLOCK
PARTY

Geometry · Volume of Rectangular Prisms
🧩 Volume
📦 Rectangular Prisms
📏 l × w × h
📦 V = B × h
📏 B = l × w
🧩 2 × 4 × 5 = 40 units³
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📚 Volume of Rectangular Prisms

The Formula

V = B × h   where   B = l × w

B is the area of the base (length × width). Multiply by the height to fill the prism with cubes!

1
Find the base area: B = l × w
B = 2 × 4 = 8 square units
2
Multiply by the height: V = B × h
V = 8 × 5 = 40 units³
3
Label with cubic units! Volume is always in units³ (cm³, in³, ft³...)

Example from the Lesson

Fractions work the exact same way — multiply all three dimensions.

4 1/2 × 2 × 12 → B = 4 1/2 × 2 = 9 → V = 9 × 12 = 108 in³
2 × 4 × 5 → B = 2 × 4 = 8 → V = 8 × 5 = 40 units³

How to Play

📦
Volume — Given the dimensions, find the volume. Choose from 4 answers.
🌎
Word Problems — Real-world boxes, pools, and tanks. Find the dimensions and multiply!
🎉
Mixed — Both types together for the ultimate challenge!
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