中等MATH-TRIG-010
A triangle has sides 7, 8 and 9. The largest angle is opposite the side of length
A. 9✓ 答案
B. 8
C. 7
D. the average of the three sides
解說
In any triangle the largest angle is opposite the longest side. The longest side is 9, so the largest angle is the one included between the sides of lengths 7 and 8.