PREVIEW
... 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 ...
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