Question

two distinct lines, l and m, are each perpendicular to the same line n. 9. what is the measure of the angle where line m meets line n? 10. what level of mastery do you think you have on the content in this formative?

Explanation:

Step1: Recall perpendicular - angle definition

By definition, if a line is perpendicular to another line, the angle between them is 90 degrees.

Step2: Apply to given lines

Since line $m$ is perpendicular to line $n$, the measure of the angle where line $m$ meets line $n$ is 90 degrees.

Answer:

90 degrees