The best revision to the sentence 'In class we learned about what triangles are and how to measure their angles the right way also.' would be 'In class we learned about what triangles are and how to measure their angles the right way.' The word 'also' at the last part of the sentence makes it awkward.
Answer:
When adolescents hang out with people their age, this can cause them to argue with their parents more
The correct answer is (c) she was surfing
The Past Progressive is the same as The Past Continuous
Subject + verb to be(in past) + principal verb (ing)