Question

what is the value of a?
a = \square^\circ
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done for now? try these next:
exterior angle inequality
proofs involvi

Explanation:

Step1: Identify exterior angle property

The exterior angle \(a\) equals the sum of the two non-adjacent interior angles of the triangle.

Step2: Set up the equation

\(a = (a-39) + (a-47)\)

Step3: Simplify the right-hand side

\(a = 2a - 86\)

Step4: Solve for \(a\)

\(2a - a = 86\)

Answer:

\(86\)