Year 9 - Surface area and volume - Free practice

Year 9 Surface Area & Volume Worksheets

Cylinders, prisms, composite 3D objects.

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10 questions — 4 Foundation, 4 Standard, 2 Extension — with full worked solutions, calibrated to the Victorian Curriculum.

About this worksheet

Why we built it

Year 9 takes 3D measurement up a level - cylinders, composite prisms, and surface area for the first time. These worksheets give your student varied 3D objects so they get comfortable identifying which formula applies to which face.

What's covered

Sub-skills your student will practise

  • Surface area of right prisms (rectangular, triangular)
  • Surface area of cylinders (curved + two circles)
  • Volume of cylinders
  • Composite solids (prism + prism, prism + cylinder)
  • Real-world problems (paint, packaging, capacity)

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Frequently asked

Questions parents ask about surface area and volume

What's the surface area of a cylinder?

Two circles (top and bottom) plus the curved side, which unrolls into a rectangle. So SA = 2 x pi x r^2 + 2 x pi x r x h. The 2 x pi x r is the circumference, which becomes the width of the unrolled rectangle.

How is Year 9 SA harder than Year 8?

Year 9 includes cylinders (curved surfaces) and composite solids (a cylinder on top of a rectangular prism, say). Students have to think about which faces are hidden inside the join and not counted.

What's the volume formula for a cylinder?

V = pi x r^2 x h - the area of the circular base times the height. Same pattern as a prism: cross-section area times length.

How do students approach a composite solid?

Split it into individual shapes, calculate the volume or SA of each, then add (for volume) or subtract any hidden faces (for SA). The hidden-face check is what catches Year 9 students out.

Want a real plan for the term?

Worksheets are great for repetition. A Tuterly tutor can spot the specific moves your student keeps getting wrong and fix them in one or two sessions.

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