# Geometry Formulas For Class 8

Geometry is a branch of mathematics that concerned with questions of shape, size, the relative position of figures, and the properties of space.Geometry Formulas are used to calculate the length, perimeter, area and volume of different geometric figures and shapes. They are also used to calculate the arc length, radius etc.

The table below gives you few important geometry formulas for class 8. The formulas listed below are commonly required in class 8 geometry to calculate lengths, areas and volumes.

 Geometry Shapes Formulas for Class 8 Name of the Solid Lateral / Curved Surface Area Total Surface Area Volume Cuboid 2h(l+b) $$2\left ( lb+bh+hl \right )$$ $$lbh$$ Cube $$4a^{2}$$ $$6a^{2}$$ $$a^{3}$$ Right Prism $$Perimeter \; of \; base \times height$$ $$Lateral \; Surface \; Area + 2(Area\; of \;One \; End)$$ $$Area\; of \; Base \times Height$$ Right Circular Cylinder $$2\pi rh$$ $$2\pi r \left (r+h \right )$$ $$\pi r^{2} h$$ Right Pyramid $$\frac{1}{2} Perimeter\; of\; Base \times Slant \; Height$$ $$Lateral\; Surface\; Area + Area\; of\; the\; Base$$ $$\frac{1}{3}(Area\; of\; the\; Base) \times height$$ Right Circular Cone $$\pi rl$$ $$\pi r \left (l+r \right )$$ $$\frac{1}{3}\pi r^{2}h$$ Sphere $$4\pi r^{2}$$ $$4\pi r^{2}$$ $$\frac{4}{3}\pi r^{3}$$ Hemisphere $$2\pi r^{2}$$ $$3\pi r^{2}$$ $$\frac{2}{3}\pi r^{3}$$
 Geometric Area Geometric Area Formula Square $$a^{2}$$ Rectangle $$ab$$ Circle $$\pi r^{2}$$ Ellipse $$\pi r1\: r2$$ Triangle $$\frac{1}{2}bh$$

#### Practise This Question

Find the number of steps to reduce 169 to 0 by the method of repeated subtraction.