Answer:
m∠1 = 72°
Step-by-step explanation:
We know: The sum of the measures of a triangle is 180°.
Therefore we have the equation:
[tex]m\angle P+m\angle O+m\angle 1=180^o[/tex]
We have
[tex]m\angle P=38^o,\ m\angle O=70^o[/tex]
Substitute:
[tex]38^o+70^o+m\angle 1=180^o[/tex]
[tex]108^o+m\angle1=180^o[/tex] subtract 108° from both sides
[tex]m\angle1=72^o[/tex]
