Question

How do I write down the values of each letters without measuring it?

Answer 1

Given the graph of parallel lines and a transversal

There is an angle = 90

This means the transversal is perpendicular to the parallel lines

So, All the angles are right angles

So, the measure of all angles = 90

So,

`\begin{gathered} m\angle g=90\degree \\ m\angle h=90\degree \\ m\angle i=90\degree \end{gathered}`