In this section, we are going to see mensuration formulas which can be used to find cured surface area, total surface area and volume of 3-D shapes like cylinder, cone and sphere.

**Cylinder :**

**Formulas : **

Curved surface area of cylinder = 2Πrh

Total surface area of cylinder = 2Πr(h + r)

Volume of cylinder = Πr^{2}h

**Cone :**

**Formulas : **

Curved surface area of cone = Πrl

Total surface area of cone = 2Πr(l + r)

Volume of cone = Πr^{2}h / 3

**Frustum Cone :**

**Formulas : **

Curved surface area of frustum cone = Π(R + r)l

Total surface area of frustum cone is

= Π(R + r)l + ΠR^{2} + Πr^{2}

Volume of frustum cone = Πh/3 ⋅ (R^{2} + Rr + r^{2})

**Sphere :**

**Formulas : **

Surface area of sphere = 4Πr^{2}

Volume of sphere = 4Πr^{3} / 3

**Hemisphere :**

**Formulas : **

Curved surface area of hemisphere = 2Πr^{2}

Total surface area of hemisphere = 3Πr^{2}

Volume of hemisphere = 2Πr^{3} / 3

**Cube : **

**Formulas : **

Surface area of cube = 4a^{2}

Total surface area of cube = 6a^{2}

Volume of hemisphere = a^{3}

**Cuboid : **

**Formulas : **

Surface area of cuboid = 2(hw + lh)

Total surface area of cuboid = 2(lw + hw + lh)

Volume of cuboid = l x w x h

**18. Heron's Triangle Area Calculator**

**20. Regular Polygon Area Calculator**

**22. Circle Sector Area Calculator**

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