Question

Calcule o triplo de 23°19'15".​

Answer 1

Lembrando que:

$\left\{\begin{matrix}1^\circ&=&60'\\ 1'&=&60''\end{matrix}\right.$

Temos:

$(23^\circ19'15'')\times3~=\\\\\\=~(23^\circ~+~19'~+~15'')\times 3\\\\\\=~3\times23^\circ~+~3\times 19'~+~3\times 15''\\\\\\=~69^\circ~+~57'~+~45''\\\\\\=~\boxed{69^\circ57'45''}$