Question

the diagram shows a triangle.
what is the value of c?
c = \square°

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is \(180^\circ\). So, \(69 + 18c + 19c = 180\).

Step2: Combine like terms

Combine \(18c\) and \(19c\): \(69 + 37c = 180\).

Step3: Solve for \(c\)

Subtract 69 from both sides: \(37c = 180 - 69 = 111\). Then divide by 37: \(c=\frac{111}{37}=3\).

Answer:

\(3\)