$\"\"$

The given exterior angles are $\"\"$ ; $\"\"$

In a convex polygon sum of measures of exterior angles is

$\"\"$

$\"\"$ (Add: $\"\"$ )

$\"\"$ (Subtract $\"\"$ from each side)

$\"\"$ (Apply additive inverse property: $\"\"$ )

$\"\"$ (Apply additive identity proerty: $\"\"$ )

$\"\"$ (Subtract: $\"\"$ ) $\"\"$

The unknown angle measure is $\"\"$ .