Application of AP in solving daily life problems

Application of trignometry in real life.

Mention some applications of thermal expansion in daily life.

Mention two practical applications of thermal expansion in daily life.

Mention atleast three applications of conductivity in daily life.

Application of problem solving strategy Determine the number of edges, vertices and in the following figure:

What do you mean by Kirchhoff's law? Discuss at least two applications of it in daily life.