Tutor: Surface Area
Stuck on a prism, cylinder, or pyramid? Tell us where — a tutor will walk through the net with you.
What this skill covers
- Prism: SA = 2(lw + lh + wh) — three pairs of faces.
- Cube: SA = 6s².
- Cylinder: SA = 2πr² + 2πrh — two circles plus the lateral rectangle.
- Square pyramid: SA = s² + 2sl — l is the slant height.
- Triangular prism: SA = ab + (a+b+c)·length.
- Nets: unfold first, number every face, then add — never skip the bottom.
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