Draw 2 diameters MN and DF in a circle. Prove that chords MD and NF are equal.
| March 12, 2021 | education
МН and DF are diameters of a circle, then ОМ = ОН = ОD = OF = R.
In triangles ОМD and ОНF, the angle MOD = HOF as vertical angles, then the triangles ОМD and ОНF are equal on two sides and the angle between them, and then МН = DF, which was required to prove.
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