Oh and you can’t bring 85 for a from the previous diagram. If you look on the question on the left a and c complement to 180 but on the right question a and c are 2 out of 3 angles in a triangle so they have to be two separate questions.
Im finding mistakes in questions not quite daily but certainly on a weekly basis at the minute as all the new GCSE material has been rushed in so fast that text books etc have hit press without proper checking.
Loads of mistakes on the pre-release exam material too and on the testable and exam.pro software for building tests. Wouldn’t be too harsh in your note to the teacher, it’ll be the first time they’ve used this question and just glanced at it without noticing the missing angle. Sometimes mistakes happen.