1.

BE ⊥ AC. AD is any line from A to BC intersecting BE in H. P, Q and R are respectively the midpoints of AH, AB and BC. ∠PQR =

Answer»

BE ⊥ AC. AD is any line from A to BC intersecting BE in H. P, Q and R are respectively the midpoints of AH, AB and BC. ∠PQR =




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