MathDB

1991.8.5

Part of Kyiv City MO 1984-93 - geometry

Problems(1)

concurent wanted, _|_ diagonals in convex quadr. 1991 Kyiv City MO 8.5

Source:

7/19/2021
The diagonals of the convex quadrilateral ABCDABCD are mutually perpendicular. Through the midpoint of the sides ABAB and ADAD draw lines, which are perpendicular to the opposite sides. Prove that they intersect on line ACAC.
geometryconcurrencyconcurrent