Angles a and e are equal because they are vertical angles.

It is given that f° = 85° and c° = 25°, therefore angle e° would be

180 - (f + c) {angles on a straight line add up to 180°}

180 - (85 + 25) {substituted 85 for f and 25 for c}

180 - (110) {added inside parentheses}

angle e° = 70 {subtracted}

Angles a° and e° are vertical angles and are equal, therefore

angle a° = 70

**C.) 70**

*- Algebra House*