WTF!
Either the American schools are too dumb(Sorry,If I offended there but I meant it) or the writer is a moron who thinks that a 17 year old guy who is about to graduate(graduation at the age of 17? WTF!) is still studying 4th grade mathematics(Acute and complimentary angles)!
Absolute farce!
Can any American here please tell me what do they study at the age of 17 in mathematics? Will any one take some time to gimme syllabus too?