中等MATH-EXAM-009
A diagram is labelled 'not to scale'. What should you do?
A. Measure lengths with a ruler and use those measurements
B. Use the given labels and geometric facts, not the apparent sizes✓ 答案
C. Treat every angle that looks like a right angle as 90°
D. Assume the longest-looking side is the hypotenuse of a non-right-angled triangle
解說
A not-to-scale sketch is only a guide. Lengths and angles come from the labels and from the geometry you can justify. Measuring the picture is not a method.