Find the lateral area of a regular square pyramid if the base edges are of length 12 and the perpendicular height is 8.

Lateral area of the pyramid = 120 square units

Step-by-step explanation:

In the figure attached,

A pyramid has been given with square base with edges of 12 units and perpendicular height as 8 units.

Lateral area of a pyramid = Area of the lateral sides

Area of one lateral side =

                                       =  [Since l = ]

                                       =

                                       =

                                       = 30 units²

Now lateral area of the pyramid = 4 × 30 = 120 square units

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents