Question

Where can I find a value for this angles with letters without measuring the Angles?

Answer 1

From the figure, we observe that,

All the horizontal lines are parallel to each other.

Hence,

`h=g=90^(\circ)`

Using the linear pair,

`\begin{gathered} i+h=180^(\circ) \\ i+90^(\circ)=180^(\circ) \\ i=90^(\circ) \end{gathered}`

Hence, the answers are,

`\begin{gathered} i=90^(\circ) \\ g=90^(\circ) \\ h=90^(\circ) \end{gathered}`