2. In a planar PCB, parallel lines of a straight line BC pass through point E, point PB O, and then connect to FO.
From PE: EC = AF: FB = 3: 2, we can get PE: EC = AF: FB = PO: OB, so the straight line FO||AP.
In the triangle FEO, the angle OFE is the angle α formed by AP and EF, and the angle OEF is the angle β formed by BC and EF.
BC⊥AP is proved from the above problems, and then EO⊥FO can be deduced, so the triangle of EOF is a right triangle, so α+β = 90.
Reflections on Mathematics Teaching in Primary Schools in 2022 1
First, primary school mathematics teaching can not rely so