This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.

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Answer
n = 9
Hapa kuna hatua za kutatua swali la 13:
Swali la 13: Pembe nne za ndani za poligoni isiyo ya kawaida ni , na huku zingine zikiwa kila moja. Tafuta idadi ya pande za poligoni.
Hatua ya 1: Andika fomula ya jumla ya pembe za ndani za poligoni yenye pande . Jumla ya pembe za ndani za poligoni ni .
Hatua ya 2: Kokotoa jumla ya pembe nne zilizotolewa. Jumla ya pembe nne = .
Hatua ya 3: Eleza jumla ya pembe zilizobaki. Ikiwa kuna pande , basi kuna pembe . Pembe nne zimetolewa, kwa hivyo pembe zilizobaki ni . Kila moja ya pembe hizi ni . Jumla ya pembe zilizobaki = .
Hatua ya 4: Sawazisha jumla ya pembe zote na fomula ya jumla ya pembe za ndani.
Hatua ya 5: Panua na kurahisisha mlinganyo.
Hatua ya 6: Tatua kwa . Kusanya maneno ya upande mmoja na nambari upande mwingine.
Idadi ya pande za poligoni ni 9. That's 2 down. 3 left today — send the next one.
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Hapa kuna hatua za kutatua swali la 13: Swali la 13: Pembe nne za ndani za poligoni isiyo ya kawaida ni 163^, 130^, 137^, na 165^ huku zingine zikiwa 133^ kila moja.
This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.