pAIrmatic Lessons

Volume and Surface Area

Grade 5Grade 6Grade 7Grade 8Geometry
GeometryAngles and PolygonsTriangle FormulasPythagorean Theorem and Special Right TrianglesSimilar FiguresArea of Quadrilaterals and PolygonsCirclesVolume and Surface AreaTransformations

Prisms and cylinders

Rectangular prism
V=lwhSA=2(lw+lh+wh)
Rectangular prism, space diagonal
d=l2+w2+h2
Cube
V=s3SA=6s2d=s3
Any right prism
V=BhLA=PhSA=2B+Ph
B base area, P base perimeter
Cylinder
V=πr2hLA=2πrhSA=2πr2+2πrh

Pyramids and cones

Pyramid
V=13BhLA=12PlSA=B+12Pl
l slant height
Cone
V=13πr2hLA=πrlSA=πr2+πrl
l = √(r² + h²)
Frustum of a cone
V=13πh(R2+Rr+r2)LA=π(R+r)l

Spheres

Sphere
V=43πr3SA=4πr2
Hemisphere
V=23πr3SA=3πr2
SA includes the flat circle

Polyhedra

Euler's formula
V−E+F=2
vertices, edges, faces

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