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The figure below is an arc of a circle with points A, B and C on the arc. Determine the coordinates of the centre of the circle.
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Step-by-step solution
4 stepsHuu hapa ni utatuzi wa swali la 11.
Swali la 11: Takwimu iliyo hapa chini ni sehemu ya duara yenye pointi A, B na C kwenye sehemu hiyo. Bainisha kuratibu za kituo cha duara (alama 4).
Pointi zilizopewa ni:
A
B
C
Fafanua kuratibu za kituo cha duara.
Acha kituo cha duara kiwe . Umbali kutoka kituo hadi pointi yoyote kwenye duara ni sawa (radius). Hivyo, .
Unda milinganyo kwa kutumia fomula ya umbali.
Tunatumia fomula ya umbali .
Kwanza, linganisha umbali wa mraba kutoka kituo hadi A na B ():Panua milinganyo:
Ondoa na kutoka pande zote mbili:
Panga upya ili kupata mlinganyo wa kwanza:
Gawanya kwa 6:
Pili, linganisha umbali wa mraba kutoka kituo hadi B na C ():
Panua milinganyo:
Ondoa na kutoka pande zote mbili:
Panga upya ili kupata mlinganyo wa pili:
Gawanya kwa 6:
Tatua mfumo wa milinganyo.
Tuna milinganyo miwili ya mstari:
Ongeza Mlinganyo 1 na Mlinganyo 2:
Tafuta thamani ya .
Badilisha kwenye Mlinganyo 2:
Kuratibu za kituo cha duara ni .
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