Question

Va rog este urgent. ​

Answer 1

Răspuns:

M ,A ,B -pct coliniare => <MAB =180°

A ,B ,N - pct coliniare => <ABN =180°

• AO = OB => <OAB=<OBA = <a

< MAB = <MAO+ < a = 180° ||

< ABN = <ABN+ <a = 180°. || => <MAO = <ABN 1.

MO =ON = R 2.

∆MON - ISOS. => < M = < N 3.

1. ||

2.||=> ∆MOA = ∆OBN => MA=BN

3.||