Mathematics, 12.02.2021 14:00 gggggg47

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In the accompanying diagram of circle 0, the ratio mBC: MCA: MAN: MNB is
5:4:1:2. Chord CB is extended to external point M. Chords AB and CN intersect
at D and tangent MN is drawn.
M
Find:
a. mBC
B
b. m ABC
N
c. m 2 NMC
OX
d. m 2 NDA
O'
em MNC
С
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