Question

three angles are congruent and adjacent and form a line. each angle measures____?

Answer 1

Answer:

60 degrees

Explanation:

Given three adjacent and congruent angles that form a line as illustrated in the diagram below:

Let each of the angles = x

The sum of angles on a line = 180 degrees.

Therefore:

$\begin{gathered} x+x+x=180 \\ \implies3x=180 \\ \implies x=\frac{180}{3} \\ x=60\degree \end{gathered}$

Each of the angles measures 60 degrees.