Xia Nuo answered with a smile.
"Well, that's good, then it will be easier for me to teach. Let's see..."
At this moment, Luo Xianyu also came over, "I've been reviewing spatial geometry lately, and I can't figure out this problem. Please, Teacher Xiao Lin, teach me!"
"Let's see...In triangular prism ABC-DEF, it is given that plane BCFE is perpendicular to plane ABC, angle ACB is a right angle, BE=EF=FC=1, BC=2, AC=3, prove that BF is perpendicular to plane ACFD?"
Lin Mengran's smile gradually froze on her face.
From her expression, Fang You could not even discern any attempt at a train of thought for the problem.
He only saw the embarrassment of encountering a barrier to reading comprehension.
But... that was normal.
"Oh my, Ayu, you little rascal, you're testing me with Olympiad problems right off the bat, aren't you, Teacher Xiao Lin!"
Lin Mengran immediately laughed and pinched Luo Xianyu's cheek, "I don't like teachers who trick their students, you know?"
