"The angle between a chord and tangent at the point of contact is equal to the angle in the alternate segment"
There has been a lot of discussion between staff at my school as to whether you must state the entire reason, or whether a shortened version would be accepted. After having a look at last years Extension 1 Mathematics HSC Exam and Suggested Solutions (as provided by the BOS), they have as their reason "angle in alternate segment". I assume that also "alternate segment theorem" would be accepted.
I am pleased that this is accepted - after all, what is it that we are testing? Whether students can memorise specific wording of a definition, or whether they understand and can apply that information?
If it can be easily understood what a student has done and that they understand the concepts being examined, they should (and in this case will) be awarded the appropriate marks.
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