Measuring Shapes and Solids

Geometry isn't just about flat shapes—it's also about space! You'll learn to calculate area (the space inside a shape), surface area (the total area covering a 3D object), and volume (how much space a 3D object contains).

Formulas

• Area of a rectangle: \(A = l \times w\)
• Surface area of a cube: \(SA = 6s^2\)
• Volume of a rectangular prism: \(V = l \times w \times h\)

Applications

Whether you're covering a floor with tiles, wrapping a present, or filling a fish tank, geometry helps you figure out how much material you need.

Visualizing 3D

Drawing nets (unfolded 3D shapes) can help you see all the faces you need to measure.